Neutrino-Production of Charm and the Strangeness Asymmetry of the Nucleon

TL;DR

This paper reviews the NLO QCD calculations of neutrino-induced charm production via dimuon signatures, highlighting their implications for understanding the nucleon's strangeness asymmetry and the NuTeV anomaly.

Contribution

It provides a detailed NLO QCD analysis of neutrino charm production and discusses its impact on the nucleon's strangeness asymmetry and the NuTeV weak mixing angle measurement.

Findings

NLO corrections are stable and do not significantly alter the strange quark density extraction.

Recent CTEQ fits incorporate these calculations to refine the strangeness asymmetry.

Implications for the NuTeV anomaly are discussed in light of these results.

Abstract

Interest in the strange nucleon sea has been renewed when it was realized that the strangeness asymmetry $s^-=s-\bar{s}$ plays a prominent role in the interpretation of the NuTeV weak mixing angle anomaly. I review the NLO QCD calculation of the neutrino-production of opposite-sign dimuons as the experimental signature of the strange quark parton density. Results from a recent CTEQ fit are presented and discussed with respect to their stability under NLO corrections and their impact on the NuTeV measurement.