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Electroweak parameters from a high statistics neutrino nucleon scattering experiment

  • Published:
Zeitschrift für Physik C Particles and Fields

Abstract

The final results from the WA 1/2 neutrino experiment in the 1984 CERN 160 GeV narrow band beam are presented. The ratiosR ν and\(R_{\bar v} \) of neutral to charged current interaction rates of neutrinos and antineutrinos in iron are measured to beR ν=0.3072±0.0033 and\(R_{\bar v} \)=0.382±0.016. A value of the electroweak parameter sin2 θ w = 1 −m 2 W /m 2 Z is extracted fromR ν. The result is sin2 θ w =0.228+0.013(m c −1.5)±0.0003 (theor.) wherem c is the mass of the charmed quark in GeV form t =60 GeV,M H =100 GeV, ρ=1. CombiningR ν and\(R_{\bar v} \) one obtains a value for ρ=0.991+0.023(m c −1.5)±0.020(exp.). Alternatively,R ν and\(R_{\bar v} \) yield a precise value of the ratio of intermediate vector boson massesm W /m Z =0.880−0.007(m c −1.5)±0.002(exp.)±0.002(theor.). Comparison of these results with those from direct measurements of the vector boson masses are presented. In a model-independent analysis the left- and right-handed neutral current coupling constants,g 2 L andg 2 R , are determined.

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Author information

Author notes

  1. P. Böckmann

    Present address: DESY, Hamburg, Germany

  2. E. W. Hughes

    Present address: Siegen University, Siegen, Germany

  3. W. Krasny

    Present address: Inst. of Nucl. Physics, Krakow, Poland

  4. A. Para

    Present address: Fermilab, Batavia, USA

  5. H. Blümer, H. D. Brummel, K. Kleinknecht, E. Müller & B. Renk

    Present address: Inst. für Physik, Univ. of Mainz, Mainz, Germany

  6. P. Buchholz

    Present address: Temple University, Philadelphia, PA, USA

  7. J. Knobloch, C. Geweniger & J. Królikowski

    Present address: CERN, Geneva, Switzerland

  8. H. Abramowicz

    Present address: Institute of Experimental Physics, University of Warsaw, Warsaw, Poland

Authors and Affiliations

  1. CERN, Geneva, Switzerland

    A. Blondel, P. Böckmann, H. Burkhardt, F. Dydak, A. L. Grant, R. Hagelberg, E. W. Hughes, W. Krasny, A. Para, H. Taureg, H. Wachsmuth & J. Wotschack

  2. Institut für Physik der Universität, Dortmund, Federal Republic of Germany

    H. Blümer, H. D. Brummel, P. Buchholz, J. Duda, B. Kampschulte, K. Kleinknecht, J. Knobloch, E. Müller & B. Renk

  3. Institut für Hochenergiephysik der Universität, Heidelberg, Federal Republic of Germany

    R. Belusević, B. Falkenburg, R. Geiges, C. Geweniger, V. Hepp, H. Keilwerth & K. Tittel

  4. DPhPE, CEN, Saclay, France

    H. Abramowicz, C. Guyot, J. P. Merlo, P. Perez, F. Perrier, J. P. Schuller, R. Turlay & B. Vallage

  5. Institute of Experimental Physics, University of Warsaw, Warsaw, Poland

    J. Królikowski & A. Lipniacka

Authors
  1. A. Blondel
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  2. P. Böckmann
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Additional information

Supported by the Bundesministerium für Forschung und Technologie, Bonn FRG

Supported by the Polish Ministry of Education, grant CPBP01.06

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Blondel, A., Böckmann, P., Burkhardt, H. et al. Electroweak parameters from a high statistics neutrino nucleon scattering experiment. Z. Phys. C - Particles and Fields 45, 361–379 (1990). https://doi.org/10.1007/BF01549665

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  • DOI: https://doi.org/10.1007/BF01549665

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