Flexible Parametrization of Generalized Parton Distributions from Deeply Virtual Compton Scattering Observables

TL;DR

This paper introduces a physically motivated parametrization of generalized parton distributions, fitting experimental data from various sources to describe nucleon structure in a specific kinematic region.

Contribution

It provides a new parametrization method for GPDs that incorporates diverse experimental and lattice data, improving the modeling of nucleon structure.

Findings

Successfully reproduces DVCS observables

Fits data from elastic form factors and deep inelastic scattering

Valid in intermediate Bjorken x and multi-GeV Q^2 regions

Abstract

We present a physically motivated parametrization of the chiral-even generalized parton distributions in the non-singlet sector obtained from a global analysis using a set of available experimental data. Our analysis is valid in the kinematical region of intermediate Bjorken $x$ and for $Q^2$ in the multi-GeV region which is accessible at present and currently planned facilities. Relevant data included in our fit are from the nucleon elastic form factors measurements, from deep inelastic scattering experiments. Additional information provided by lattice calculations of the higher moments of generalized parton distributions, is also considered. Recently extracted observables from Deeply Virtual Compton Scattering on the nucleon are reproduced by our fit.