Quark helicity flip generalized parton distributions from two-flavor lattice QCD

TL;DR

This study explores quark helicity flip generalized parton distributions using lattice QCD, providing initial insights into their moments and structure, which are crucial for understanding the nucleon's transverse spin.

Contribution

First lattice QCD investigation of quark helicity flip GPDs with detailed analysis of moments and extrapolations, advancing understanding of nucleon spin structure.

Findings

Initial moments and dipole masses of GPDs obtained

Chiral and continuum extrapolations performed

Results contribute to understanding nucleon transverse spin

Abstract

We present an initiatory study of quark helicity flip generalized parton distributions (GPDs) in n_f=2 lattice QCD, based on clover-improved Wilson fermions for a large number of coupling constants and pion masses. Quark helicity flip GPDs yield essential information on the transverse spin structure of the nucleon. In this work, we show first results on their lowest moments and dipole masses and study the corresponding chiral and continuum extrapolations.