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Off the Mass Shell: Electroweak Physics at NuTeV

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arxiv hep-ex/0210010 v1 pith:BC4Y6YKI submitted 2002-10-04 hep-ex

Off the Mass Shell: Electroweak Physics at NuTeV

K. S. McFarland , G. P. Zeller , T. Adams , A. Alton , S. Avvakumov , L. deBarbaro , P. deBarbaro , R. H. Bernstein
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A. Bodek T. Bolton J. Brau D. Buchholz H. Budd L. Bugel J. Conrad R. B. Drucker B. T. Fleming R. Frey J. A. Formaggio J. Goldman M. Goncharov D. A. Harris R. A. Johnson J. H. Kim S. Koutsoliotas M. J. Lamm W. Marsh D. Mason J. McDonald C. McNulty D. Naples P. Nienaber V. Radescu A. Romosan W. K. Sakumoto H. Schellman M. H. Shaevitz P. Spentzouris E. G. Stern N. Suwonjandee M. Tzanov M. Vakili A. Vaitaitis U. K. Yang J. Yu E. D. Zimmerman
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keywords highanti-neutrinobeamscurrentelectroweakneutrinonutevprecision
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The NuTeV collaboration 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 sigma above the prediction. We discuss possible explanations for and implications of this discrepancy.

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