What did we learn about GPDs from hard exclusive electroproduction of mesons?
P. Kroll (Wuppertal Univ.)
TL;DR
This paper analyzes light meson electroproduction at small Bjorken-x using the handbag approach, connecting experimental data with generalized parton distributions and lattice results.
Contribution
It introduces a detailed analysis of GPDs from meson electroproduction data within the handbag framework, incorporating transverse momenta and sum rule constraints.
Findings
Comparison of GPD moments with lattice results
Validation of the handbag approach at small x
Insights into meson production mechanisms
Abstract
It is reported on an analysis of electroproduction of light 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 by means of double distributions. The constraints from parton distributions and sum rules are taken into account. Various moments of these generalized parton distributions are compared to recent results from lattice gauge theories.
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