PRECISION-MEASUREMENT OF ELECTROWEAK PARAMETERS FROM THE SCATTERING OF MUON-NEUTRINOS ON ELECTRONS


Vilain P., Wilquet G., Beyer R., Flegel W., Grote H., Mouthuy T., ...More

PHYSICS LETTERS B, vol.335, no.2, pp.246-252, 1994 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 335 Issue: 2
  • Publication Date: 1994
  • Doi Number: 10.1016/0370-2693(94)91421-4
  • Title of Journal : PHYSICS LETTERS B
  • Page Numbers: pp.246-252

Abstract

We report final results on electroweak parameters from muon-neutrino electron scattering observed in the CHARM II detector from 1987 till 1991. In total 2677 +/- 82 and 2752 +/- 88 neutrino-electron scattering events have been detected in the nu and nuBAR-beam, respectively. From the ratio of differential cross sections we obtain for the electroweak mixing angle sin2 THETA(nue) = 0.2324 +/- 0.0083. From the absolute neutrino-electron scattering event rate we determined the effective vector and axial-vector neutral current coupling constants to be g(v)nue = -0.035 +/-0.017 and g(A)nue = -0.503 +/- 0.017.