Quadrupole moment of the nucleon in chiral constituent quark model

TL;DR

This paper calculates the intrinsic quadrupole moments of octet and decuplet baryons using the chiral constituent quark model, providing insights into the nucleon's shape and internal structure.

Contribution

It introduces a calculation of baryon quadrupole moments within the chiral constituent quark model, linking theoretical predictions with experimental hints of nucleon deformation.

Findings

Calculated intrinsic quadrupole moments for baryons

Supports the idea of a deformed nucleon shape

Demonstrates the effectiveness of QM in nonperturbative regime

Abstract

The electromagnetic form factors are the most fundamental quantities to describe the internal structure of the nucleon and the shape of a spatially extended particle is determined by its {\it intrinsic} quadrupole moment which is first order moment of the charge density operator. With some experimental indications of a deformed nucleon, we have calculated the {\it intrinsic} quadrupole moment of the octet and decuplet baryons in the framework of chiral constituent quark model \chiCQM which is quite successful in explaining some of the important baryon properties in the nonperturbative regime.