Chiral-Odd Generalized Parton Distributions from Exclusive pi^o Electroproduction

TL;DR

This paper proposes a method to extract chiral-odd generalized parton distributions from exclusive pi^0 electroproduction data, connecting partonic and Regge phenomenology, and utilizing diverse experimental and lattice inputs for a model-independent analysis.

Contribution

It introduces a physically motivated parametrization valid at non-zero skewness, integrating form factor, scattering, and lattice data to improve GPD extraction.

Findings

Connection established between GPDs and Regge phenomenology.

Method enables more model-independent extraction of GPDs.

Utilizes data from form factors, deep inelastic scattering, and lattice QCD.

Abstract

Exclusive $\pi^o$ electroproduction is suggested for extracting both the tensor charge and the transverse anomalous magnetic moment from experimental data. A connection between partonic degrees of freedom, given in terms of Generalized Parton Distributions, and Regge phenomenology is discussed. Calculations are performed using a physically motivated parametrization that is valid at values of the skewness, $\zeta \neq 0$. Our method makes use of information from the nucleon form factor data, from deep inelastuc scattering parton distribution functions, and from lattice results on the Mellin moments of generalized parton distributions. It provides, therefore, a step towards a model independent extraction of generalized distributions from the data, alternative to other mathematical ansatze available in the literature.