학술논문
A precision measurement of electroweak parameters in neutrino-nucleon scattering
Document Type
article
Author
McFarland, KS; Arroyo, CG; King, BJ; De Barbaro, L; De Barbaro, P; Bazarko, AO; Bernstein, RH; Bodek, A; Bolton, T; Budd, H; Bugel, L; Conrad, J; Drucker, RB; Harris, DA; Johnson, RA; Kim, JH; Kinnel, T; Lamm, MJ; Lefmann, WC; Marsh, W; McNulty, C; Mishra, SR; Naples, D; Quintas, PZ; Romosan, A; Sakumoto, WK; Schellman, H; Sciulli, FJ; Seligman, WG; Shaevitz, MH; Smith, WH; Spentzouris, P; Stern, EG; Vakili, M; Yang, UK; Yu, J; Zeller, GP
Source
European Physical Journal C. 1(3-4)
Subject
Language
Abstract
The CCFR collaboration reports a precise measurement of electroweak parameters derived from the ratio of neutral-current to charged-current cross-sections in neutrino-nucleon scattering at the Fermilab Tevatron. We determine sin2 θ(on-shell)W = 0.2236 ± 0.0028 (expt.) ± 0.0030 (model) for Mtop = 175 GeV, MHiggs = 150 GeV. This is equivalent to MW = 80.35 ± 0.21 GeV. The good agreement of this measurement with Standard Model expectations implies the exclusion of additional vvqq contact interactions at 95% confidence at a mass scale of 1-8 TeV, depending on the form of the contact interaction.