Precise Determination of Electroweak Parameters in Neutrino-Nucleon Scattering

12 February 2002

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 88 (9) , 091802
https://doi.org/10.1103/physrevlett.88.091802

Abstract

The NuTeV Collaboration has extracted the electroweak parameter

{sin}^{2} θ_{W}

from the measurement of the ratios of neutral current to charged current

ν

and

\bar{ν}

cross sections. Our value,

{sin}^{2} θ_{W}^{(on - shell)} = 0.2277 \pm 0.0013 (stat) \pm 0.0009 (syst)

, is 3 standard deviations above the standard model prediction. We also present a model independent analysis of the same data in terms of neutral-current quark couplings.

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