Baryon vector and axial content up to the 7Q component

TL;DR

This paper investigates the vector and axial properties of baryons using the light-cone Chiral-Quark Soliton Model, extending calculations to include the 7-quark component and analyzing detailed flavor and spin contributions.

Contribution

It provides the first computation of 7Q contributions to baryon charges within the model, offering new insights into baryon structure beyond previous 5Q analyses.

Findings

7Q component slightly alters baryon charges by a few percent

Explicit quadrupole deformation observed in decuplet baryons

Sum of quark spins exceeds that of pentaquark states

Abstract

We have used the light-cone formulation of Chiral-Quark Soliton Model to investigate the vector and axial content of octet, decuplet and the hypothetical antidecuplet in the flavor SU(3) symmetry limit. We have extended previous works by computing the 7Q contribution to vector and axial charges for the octet and antidecuplet but stayed at the 5Q sector for the decuplet where the full computation needs much more time. As expected the 7Q component has a weaker impact on the quantities but still changes them by a few percent. We give also a detailed decomposition of those charges into flavor, valence quark, sea quark and antiquark contributions. Many of them are of course not (yet) measured or estimated and constitute then a theoretical estimation. Among the different interesting observations made in this work are the explicit quadrupole deformation of decuplet baryons due to the pion field and the sum of quark spins larger than the pentaquark one.