NLO corrections to the deeply virtual meson production revisited: impact on the extraction of generalized parton distributions
arXiv:2310.13837 · doi:10.1007/JHEP12(2023)192 10.1007/JHEP02(2024)225
Abstract
We revisit the next-to-leading order (NLO) perturbative QCD corrections for the deeply virtual meson production (DVMP) process, exploring its phenomenology both in isolation and in a multichannel fit combined with deeply virtual Compton scattering (DVCS). Our approach involves the conformal partial wave (CPaW) formalism, which allows for the straightforward inclusion of higher-order contributions and evolutionary effects. Our findings indicate that a description of the longitudinal component of the vector meson DVMP cross-section at high energies is achievable only at NLO within the standard collinear approach. Furthermore, we demonstrate a simultaneous description of DIS, DVCS, and DVMP processes, providing insights into the proton structure described at NLO by unique universal generalized parton distribution (GPD) functions.
arXiv comment36 pages, 13 figures, small corrections, refs added, matches published version + erratum
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