Isospin Violation and the Proton's Strange Form Factors

TL;DR

This paper discusses how isospin violation affects the extraction of strange form factors of the proton, using heavy baryon chiral perturbation theory to quantify these contributions.

Contribution

It provides a theoretical calculation of isospin violating effects on proton form factors within heavy baryon chiral perturbation theory.

Findings

Isospin violation contributes significantly to measured strange form factors.

Heavy baryon chiral perturbation theory effectively models isospin violating effects.

Results help refine the interpretation of experimental data on proton structure.

Abstract

The strange form factors of the proton are basic to an understanding of proton structure, and are presently the focus of many experiments. Before the strangeness effects can be extracted from data, it is necessary to calculate and remove effects due to isospin violation, which exist independently of the strange quark but which contribute nevertheless to the experimentally measured ``strange'' form factors. A discussion of the isospin violating contributions to vector form factors is given here in the context of heavy baryon chiral perturbation theory.