Updated Electroweak Measurements from Neutrino-Nucleon Deeply Inelastic Scattering at CCFR

TL;DR

This paper presents improved electroweak parameter measurements from neutrino-nucleon deep inelastic scattering, refining the weak mixing angle and constraining new physics beyond the Standard Model.

Contribution

It introduces an enhanced extraction technique for the weak mixing angle using additional data and systematic error constraints, providing more precise electroweak measurements.

Findings

Precise measurement of the weak mixing angle consistent with the Standard Model.

Constraints on neutral-current quark-neutrino couplings.

Limits set on new four-fermion interactions, leptoquarks, and neutrino oscillations.

Abstract

We report the results of a study of electroweak parameters from observations of neutral-current $\nu$N deeply inelastic scattering in the CCFR detector at the FNAL Tevatron Quadrupole Triplet neutrino beam. An improved extraction of the weak mixing angle in the on-shell renormalization scheme, incorporating additional data and with an improved technique for constraining systematic errors, is presented. Within the Standard Model, this result constrains the W mass with a precision comparable to that from direct measurements. The result is also presented in a model-independent form, as constraints on neutral-current quark-neutrino couplings, to facilitate comparisons with theories outside the Standard Model. Using this result, limits on new four-fermion interactions, leptoquarks and neutrino oscillations are presented. Prospects for a successor experiment, NuTeV (FNAL-E815), are also presented.