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A Departure from Prediction: Electroweak Physics at Nutev
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A Departure from Prediction: Electroweak Physics at Nutev

K. S McFarland, G. P Zeller, T Adams, A Alton, S Avvakumov, L deBarbaro, P deBarbaro, R. H Bernstein, A Bodek, T Bolton, …
22 May 2002
url
https://doi.org/10.48550/arxiv.hep-ex/0205080View
Preprint (Author's original)arXiv.org - Non-exclusive license to distribute Open

Abstract

Physics - High Energy Physics - Experiment
The NuTeV experiment has performed precision measurements of the ratio of neutral-current to charged-current cross-sections in high rate, high energy neutrino and anti-neutrino beams on a dense, primarily steel, target. The separate neutrino and anti-neutrino beams, high statistics, and improved control of other experimental systematics, allow the determination of electroweak parameters with significantly greater precision than past neutrino-nucleon scattering experiments. Our null hypothesis test of the standard model prediction measures sin2thetaW=0.2277+/-0.0013(stat)+/-0.0009(syst), a value which is 3.0 standard deviations above the prediction. We discuss possible explanations for and implications of this discrepancy.

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