The s-s(bar) asymmetry in nucleon and "NuTeV anomaly"

TL;DR

This paper investigates the s-s(bar) asymmetry in nucleons using a penta-quark model to explain its contribution to the NuTeV anomaly, highlighting its significance for nucleon structure and strong interactions.

Contribution

It introduces a novel penta-quark configuration model for the s-s(bar) asymmetry and assesses its impact on the NuTeV anomaly, providing a new theoretical perspective.

Findings

s-s(bar) asymmetry contributes about 10-20% to the NuTeV anomaly

The penta-quark model offers a new approach to understanding nucleon sea asymmetries

Different theoretical frameworks yield varying conclusions on the asymmetry's effects

Abstract

The $s$-$\bar{s}$ asymmetry in nucleon sea is an important observable for understanding nucleon structure and strong interaction. There have been many theoretical attempts on this subject and recently on its relation to the "NuTeV anomaly". Calculations with different theoretical frameworks lead to different conclusions. Here assuming a newly proposed penta-quark configuration for the $s$-$\bar{s}$ asymmetry in nucleon, we examine its contribution to the "NuTeV anomaly", with a result of about $10-20%$.