Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

G. Agakishiev (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   H. Alvarez-Pol (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   A. Balanda (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   R. Bassini (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   M. Böhmer (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   H. Bokemeyer (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   J. L. Boyard (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   P. Cabanelas (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   S. Chernenko (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   T. Christ (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   M. Destefanis (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   F. Dohrmann (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   A. Dybczak (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   T. Eberl (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   L. Fabbietti (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   O. Fateev (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   P. Finocchiaro (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   J. Friese (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   I. Fröhlich (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   T. Galatyuk (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   J. A. Garzón (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   R. Gernhäuser (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
  
C. Gilardi
(HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   M. Golubeva (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   D. González-Díaz (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   F. Guber (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   M. Gumberidze (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   T. Hennino (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   R. Holzmann (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   A. Ierusalimov (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   I. Iori (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   A. Ivashkin (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   M. Jurkovic (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   B. Kämpfer (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   K. Kanaki (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   T. Karavicheva (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   I. Koenig (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   W. Koenig (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   B. W. Kolb (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   R. Kotte (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   A. Kozuch (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   F. Krizek (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   W. Kühn (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   A. Kugler (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   A. Kurepin (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   S. Lang (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   K. Lapidus (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   T. Liu (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   L. Maier (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   J. Markert (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   V. Metag (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   B. Michalska (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   E. Morinière (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   J. Mousa (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   M. Münch (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   C. Müntz (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   L. Naumann (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany
II.Physikalisches Institut, Justus Liebig Universität Giessen, 35392 Giessen, Germany
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, 20133 Milano, Italy
Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Department of Physics, University of Cyprus, 1678 Nicosia, Cyprus
Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3 - Université Paris Sud, F-91406 Orsay Cedex, France
Nuclear Physics Institute, Academy of Sciences of Czech Republic, 25068 Rez, Czech Republic
Departamento de Física de Partículas, Univ. de Santiago de Compostela, 15706 Santiago de Compostela, Spain

also at Lawrence Berkeley National Laboratory,  Berkeley, USA
also at ExtreMe Matter Institute EMMI, 64291 Darmstadt, Germany
also at Technische Universität Darmstadt, 64289 Darmstadt, Germany
also at Technische Universität Dresden, 01062 Dresden, Germany
also at Dipartimento di Fisica, Università di Milano, 20133 Milano, Italy
also at Panstwowa Wyzsza Szkola Zawodowa, 33-300 Nowy Sacz, Poland
also at Dipartimento di Fisica Generale and INFN, Università di Torino, 10125 Torino, Italy
   J. Otwinowski (HADES collaboration)
Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud, 95125 Catania, Italy
Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Kraków, Poland
GSI Helmholtz-Zentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Institut für Strahlenphysik, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Joint Institute of Nuclear Research, 141980 Dubna, Russia
Institut für Kernphysik, Goethe-Universität, 60438  Frankfurt, Germany
Excellence Cluster ’Origin and Structure of the Universe’, 85748 Garching, Germany
Physik Department E12, Technische Universität München, 85748 Garching, Germany