# Chiral Corrections to Baryon Electromagnetic Form Factors

## TL;DR

This paper investigates the impact of chiral symmetry-based pion loop corrections on baryon electromagnetic form factors within the NJL model, comparing hadron-level and parton-level implementations to improve low-energy nucleon property descriptions.

## Contribution

It introduces a hadron-level approach to incorporate pion loop corrections in the NJL model and compares it with the traditional parton-level method, highlighting improvements for certain baryons.

## Key findings

- Hadron-level corrections improve the description of the $ ext{Sigma}^-$ baryon.
- Both approaches yield good results for low-energy nucleon properties.
- Hadron-level corrections show notable improvements over parton-level in specific cases.

## Abstract

Corrections motivated by chiral symmetry arguments have long been known to give important contributions to hadronic observables, particularly at low momentum transfer. It is possible to separate these approaches into two broad groups; either the corrections are implemented at the parton level, or at the hadron level. We explore the results of incorporating pion loop corrections at the hadron level to a calculation of electromagnetic form factors in the NJL model. These calculations are compared with the result of an earlier implementation of pion loops at the parton level using the same NJL model formalism. A particular parameter set yields a good description of low energy nucleon properties within both approaches. However, for the $\Sigma^-$ there is a remarkable improvement when the chiral corrections are implemented at the hadronic level.