Flavor and Spin Structure of Octet Baryons at Large x

TL;DR

This paper compares quark flavor and spin distributions in octet baryons using two models, highlighting differences in the Lambda baryon and proposing Drell-Yan processes to test model predictions.

Contribution

It introduces a comparative analysis of octet baryon structures using SU(6) and pQCD models, emphasizing the Lambda baryon and experimental tests via Drell-Yan processes.

Findings

Lambda shows significant model-dependent flavor differences at large x

Drell-Yan processes can test valence quark flavor predictions for Sigma baryons

Other baryons' structures also provide model testing grounds

Abstract

The quark flavor and spin distributions in octet baryons are calculated both in the SU(6) quark spectator diquark model and in a perturbative QCD (pQCD) based model. It is shown that the $\Lambda$ has the most significant difference in flavor structure at large $x$ between the two models, though the flavor and spin structure of other baryons can also provide tests of different models. The Drell-Yan process for $\Sigma^{\pm}$ beams on isoscalar targets can be used to test different predictions concerning the valence quark flavor structure of the $\Sigma^{\pm}$.