Reassessment of the NuTeV determination of the Weinberg angle

TL;DR

This paper reevaluates the NuTeV measurement of the Weinberg angle by incorporating recent corrections like the isovector EMC effect, charge symmetry violation, and s-ar{s} asymmetry, resulting in a value consistent with the Standard Model.

Contribution

It provides a revised analysis of the NuTeV data, including new corrections, leading to a more accurate determination of sin^2 theta_W.

Findings

Revised sin^2 theta_W value: 0.2232 ± 0.0013(stat) ± 0.0024(syst)

Result aligns with Standard Model predictions

Highlights importance of isovector EMC effect and other corrections

Abstract

In light of the recent discovery of the importance of the isovector EMC effect for the interpretation of the NuTeV determination of sin^2 theta_W, it seems timely to reassess the central value and the errors on this fundamental Standard Model parameter derived from the NuTeV data. We also include earlier work on charge symmetry violation and the recent limits on a possible asymmetry between s and \bar{s} quarks. With these corrections we find a revised NuTeV result of sin^2 theta_W = 0.2232 \pm 0.0013(stat) \pm 0.0024(syst), which is in excellent agreement with the running of sin^2 theta_W predicted by the Standard Model.