Flavour structure of the nucleon electromagnetic form factors and transverse charge densities in the chiral quark-soliton model

TL;DR

This paper analyzes the nucleon's electromagnetic form factors and transverse charge densities using the chiral quark-soliton model, incorporating flavor decomposition, symmetry corrections, and comparisons with experimental data.

Contribution

It provides a detailed flavor decomposition of nucleon form factors within the $ ext{χ}$QSM, including strange-quark effects and transverse charge density analysis.

Findings

Strange quark contributions significantly affect the neutron's charge density.

Transverse charge density inside the neutron is negative near the center due to strange quarks.

Model results align with recent experimental data on nucleon form factors.

Abstract

We investigate the flavour decomposition of the electromagnetic form factors of the nucleon, based on the chiral quark-soliton model ($\chi$QSM) with symmetry-conserving quantisation. We consider the rotational $1/N_c$ and linear strange-quark mass ($m_s$) corrections. We discuss the results of the flavour-decomposed electromagnetic form factors in comparison with the recent experimental data. In order to see the effects of the strange quark, we compare the SU(3) results with those of SU(2). We finally discuss the transverse charge densities for both unpolarised and polarised nucleons. The transverse charge density inside a neutron turns out to be negative in the vicinity of the centre within the SU(3) $\chi$QSM, which can be explained by the contribution of the strange quark.