The impact factor for the virtual photon to light vector meson transition

Abstract

We evaluate in the next-to-leading approximation the forward impact factor for the virtual photon to light vector meson transition in the case of longitudinal polarization. We find that in the hard kinematic domain, both in the leading and in the next-to-leading approximation, the expression for the impact factor factorizes, up to power suppressed corrections, into the convolution of a perturbatively calculable hard-scattering amplitude and a meson twist-2 distribution amplitude.

31 pages latex; few comments and one reference added; version to appear in Eur. Phys. Journal C

References in corpus (4)

• The NLO Jet Vertex for Mueller-Navelet and Forward Jets: the Gluon Part
• NLO Corrections to the Photon Impact Factor: Combining Real and Virtual Corrections
• Photon-Reggeon Interaction Vertices in the Nla
• On the Calculation of the NLO Virtual Photon Impact Factor

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