Electroweak Physics Results from NuTeV

TL;DR

NuTeV conducted precise electroweak measurements using high-energy neutrino beams, revealing a significant deviation from the Standard Model predictions in the weak mixing angle, which could imply new physics or experimental anomalies.

Contribution

This paper presents the first high-precision measurement of the electroweak mixing angle using neutrino scattering, highlighting a notable discrepancy with the Standard Model.

Findings

Measured $ ext{sin}^2 heta_W^{ u N}$ as 0.2277 with uncertainties

Observed a +3.0$\sigma$ deviation from Standard Model predictions

Provided constraints on electroweak parameters using neutrino scattering data

Abstract

NuTeV has performed precise measurements of neutral-current to charged-current cross section ratios using intense high energy neutrino and anti-neutrino beams on a primarily steel target at the Fermilab Tevatron. A null hypothesis test of the standard model allows the extraction $\sin^2\theta_W^{\nu N}(\equiv 1-M_W^2/M_Z^2)=0.2277\pm0.0013(stat)\pm0.0009(syst)$, a value that differs from predictions of global electroweak fits by $+3.0\sigma$.