Abstract
An unfortunate misprint in our numerical code has led to an overestimate of the cross section for the exclusive photoproduction of a γ ρL pair in the kinematics where the pair has a large invariant mass and the final nucleon has a small transverse momentum, described in the collinear factorization framework. The rates are thus expected to be smaller but the possibility to disentangle the transversity GPDs through the process where the ρ−meson is transversely polarized is enhanced.
Highlights
An unfortunate misprint in our numerical code has led to an overestimate of the cross section for the exclusive photoproduction of a γ ρL pair in the kinematics where the pair has a large invariant mass and the final nucleon has a small transverse momentum, described in the collinear factorization framework
We show the dominance of the u-quark contribution due to the charge effect
We show the dominance of the vector GPD contributions
Summary
An unfortunate misprint in our numerical code has led to an overestimate of the cross section for the exclusive photoproduction of a γ ρL pair in the kinematics where the pair has a large invariant mass and the final nucleon has a small transverse momentum, described in the collinear factorization framework. In black the contributions of both u and d quarks, in blue the contribution of the u quark, and in green the contribution of the d quark. We show the dominance of the u-quark contribution due to the charge effect. Dσeven d(−u′ )d(−t) dMγρ dσeven (pb · GeV−6 )
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