Nucleon electromagnetic form factors with 2+1 flavors of domain wall fermions

TL;DR

This paper reports high-statistics lattice QCD calculations of nucleon electromagnetic form factors using domain wall fermions, analyzing their momentum dependence and chiral extrapolations to connect with physical observables.

Contribution

It provides detailed lattice QCD results for nucleon form factors with multiple pion masses and compares different chiral effective field theory approaches for extrapolation.

Findings

Form factors computed at three pion masses.

Chiral extrapolations performed using SSE and covariant baryon chiral perturbation theory.

Results inform understanding of nucleon structure and electromagnetic properties.

Abstract

We present the recent high-statistics calculations of the nucleon electromagnetic form factors with fully dynamical domain wall fermions on the 32^3x64 lattices generated by the RBC and UKQCD collaborations, with pion masses at roughly 297 MeV, 355 MeV and 403 MeV. We study the phenomenological fits to the momentum transfer dependence of the form factors and investigate chiral extrapolations for the Dirac radius, Pauli radius and the anomalous magnetic moment using two variants of chiral effective field theories, the small scale expansion (SSE) and covariant baryon chiral perturbation theory.