Spin and Flavor Strange Quark Content of the Nucleon

TL;DR

This paper uses the chiral constituent quark model with configuration mixing to calculate various spin and flavor parameters related to the strangeness content of the nucleon, aligning well with recent experimental data.

Contribution

It provides detailed calculations of strangeness parameters in the nucleon within the QM_{config} model, offering insights into the nucleon's internal structure.

Findings

Calculated strange spin polarization elta s

Determined strangeness contribution to magnetic moments

Estimated strangeness flavor ratios and fractions

Abstract

Several spin and flavor dependent parameters characterizing the strangeness content of the nucleon have been calculated in the chiral constituent quark model with configuration mixing (\chiCQM_{config}) which is known to provide a satisfactory explanation of the ``proton spin crisis'' and related issues. In particular, we have calculated the strange spin polarization \Delta s, the strangeness contribution to the weak axial vector couplings \Delta_8 etc., strangeness contribution to the magnetic moments \mu(p)^s etc., the strange quark flavor fraction f_s, the strangeness dependent quark flavor ratios \frac{2 \bar s}{u+d} and \frac{2 \bar s}{\bar u+ \bar d} etc.. Our results are consistent with the recent experimental observations.