Electroproduction of longitudinally polarized vector mesons

TL;DR

This paper analyzes the electroproduction of light vector mesons with longitudinal polarization at small Bjorken-x using a modified perturbative approach, achieving good agreement with experimental data across various kinematics.

Contribution

It introduces a detailed handbag approach with transverse quark momenta for vector meson electroproduction, connecting generalized parton distributions to CTEQ6 PDFs.

Findings

Cross sections match experimental data well

Modified perturbative approach improves accuracy

Generalized parton distributions are effectively modeled

Abstract

It is reported on an analysis of electroproduction of light vector mesons at small Bjorken-x within the handbag approach. The partonic subprocesses, meson electroproduction off quarks or gluons, are calculated within the modified perturbative approach in which quark transverse momenta are retained. The soft hadronic matrix elements, generalized parton distributions, are constructed from the CTEQ6 parton distribution functions by means of double distributions. The cross sections for longitudinal polarized virtual photons evaluated from this approach, are in very good agreement with experiment in a wide range of kinematics. Talk presented at the DIS2007 conference, Munich (2007)