On universality of the coupling of neutrinos to Z

Abstract

We employ an effective Lagrangian approach and use LEP data to place severe bounds on universality violations of the couplings of ${\nu }_e$, ${\nu }_{\mu }$, and ${\nu }_{\tau }$ to the $Z$ boson. Our results justify the assumption of universality in these couplings that is usually made, as for example in the analysis of solar neutrinos detected at SNO.

8 pages, no figures. A few comments added. It matches version to be published in PRD

References in corpus (3)

• Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in the Sudbury Neutrino Observatory
• Measurement of the rate of nu_e + d --> p + p + e^- interactions produced by 8B solar neutrinos at the Sudbury Neutrino Observatory
• Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters

Cited by in corpus (4)

• Absolute Values of Neutrino Masses: Status and Prospects
• Leptonic $Z$ decays in the littlest $Higgs$ model with T-parity
• Tests of flavor universality for neutrino-Z couplings in future neutrino experiments
• Probe of anomalous neutrino couplings to W and Z in medium energy setup of a beta-beam facility