The flavour asymmetry and quark-antiquark asymmetry in the $\Sigma^+$-sea

TL;DR

This paper investigates the sea quark content of the + baryon using a light-cone fluctuation model, revealing significant flavor and quark-antiquark asymmetries that differ from SU(3) predictions.

Contribution

It introduces a model-based analysis of + sea quark asymmetries, providing predictions that challenge traditional SU(3) symmetry expectations.

Findings

+ sea is flavor asymmetric (bar > ar > ar)

Predicted asymmetries differ from SU(3) predictions

+ d-bar asymmetry aligns with SU(3)

Abstract

The sea quark content of the $\Sigma^+$ baryon is investigated using light-cone baryon-meson fluctuation model suggested by Brodsky and Ma. It is found that the $\Sigma^+$ sea is flavour asymmetric ($\dbar > \ubar > \sbar$) and quark-antiquark asymmetric ($q \not= \qbar$). Our prediction for the flavour asymmetry, $\dbar > \ubar > \sbar$, is significantly different from the SU(3) prediction ($\dbar < \ubar < \sbar$), while our prediction for the $d$-$\dbar$ asymmetry is consistent with the SU(3) prediction.