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Precision Measurement of the Weak Mixing Angle in Moller Scattering
Physical Review Letters (2005)
  • P. L. Anthony
  • R. G. Arnold
  • C. Arroyo
  • K. Bega
  • J. Biesiada
  • P. E. Bosted
  • G. Bower
  • J. Cahoon
  • R. Carr
  • G. D. Cates
  • J. P. Chen
  • E. Chudakov
  • M. Cooke
  • P. Decowski
  • A. Deur
  • W. Emam
  • R. Erickson
  • T. Fieguth
  • C. Field
  • J. Gao
  • M. Gary
  • K. Gustafsson
  • R. S. Hicks
  • R. Holmes
  • E. W. Hughes
  • T. B. Humensky
  • G. M. Jones
  • L. J. Kaufman
  • L. Keller
  • Yu G. Kolomensky
  • Krishna Kumar, University of Massachusetts - Amherst
  • P. LaViolette
  • D. Lhuillier
  • R. M. Lombard-Nelsen
  • Z. Marshall
  • P. Mastromarino
  • R. D. McKeown
  • R. Michaels
  • J. Niedziela
  • M. Olson
  • K. D. Pashke
  • G. A. Peterson
  • R. Pitthan
  • D. Relyea
  • S. E. Rock
  • O. Saxton
  • J. Singh
  • P. A. Souder
  • Z. M. Szalata
  • J. Turner
  • B. Tweedie
  • A. Vacharet
  • D. Walz
  • T. Weber
  • J. Weisend
  • M. Woods
  • I. Younus

We report on a precision measurement of the parity-violating asymmetry in fixed target electron-electron (Møller) scattering: APV=[−131±14(stat)±10(syst)]×10−9, leading to the determination of the weak mixing angle sin2θeffW=0.2397±0.0010(stat)±0.0008(syst), evaluated at Q2=0.026  GeV2. Combining this result with the measurements of sin2θeffW at the Z0 pole, the running of the weak mixing angle is observed with over 6σ significance. The measurement sets constraints on new physics effects at the TeV scale.

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P. L. Anthony, R. G. Arnold, C. Arroyo, K. Bega, et al.. "Precision Measurement of the Weak Mixing Angle in Moller Scattering" Physical Review Letters Vol. 95 Iss. 8 (2005)
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