We have calculated, in both LCCF and CCF, the forward impact factor Φγ∗→ρ of the subprocess
g+γ∗→g+ρT,
defined as
the integral of the discontinuity in the s
channel of the off-shell S-matrix element
Sγ∗Tg→ρTgμ.
In LCCF, one computes the diagrams per…