Using baryon octet magnetic moments and masses to fix the pion cloud contribution

TL;DR

This paper uses baryon octet magnetic moments and masses within SU(3) symmetry and covariant spectator theory to constrain pion cloud contributions to baryon form factors at zero momentum transfer.

Contribution

It introduces a model-independent method to determine pion cloud effects on baryon properties using experimental data and symmetry assumptions.

Findings

Pion cloud contributions are quantitatively constrained by baryon data.

The approach provides bounds on the pion cloud's impact on nucleon form factors.

Results support the significance of pion cloud effects in baryon structure.

Abstract

Using SU(3) symmetry to constrain the pion BB' couplings, assuming SU(3) breaking comes only from one-loop pion cloud contributions, and using the the covariant spectator theory to describe the photon coupling to the quark core, we show how the experimental masses and magnetic moments of the baryon octet can be used to set a model independent constraint on the strength of the pion cloud contributions to the octet, and hence the nucleon, form factors at Q2=0.