A Direct Constraint on Dimension-Eight Operators from Z-->neutrino antinetrino gamma

Abstract

We study the radiative decay Z-->neutrino antineutrino gamma whitin an effective Lagrangian approach. Using the search for energetic single-photon events in the data collected by the L3 collaboration, we get direct bounds on the dimension-six and the dimension-eight operators associated with the tau-neutrino magnetic moment and the anomalous electromagnetic properties of the Z boson. As a by-product of our calculation, we reproduce the L3 result for the bound on the tau-neutrino magnetic moment.

6 pages, 1 figure. Corrected version to appear in Physics Letters B. A numerical mistake is corrected. Asbtract and conclusions change. A reference is added

References in corpus (2)

• Probing nonstandard bosonic interactions via W-boson pair production at lepton colliders
• Tests of Higgs and Top Effective Interactions

Cited by in corpus (9)

• New physics effects in rare Z decays
• Electromagnetic properties of the neutrinos in gamma-proton collision at the LHC
• Trilinear Neutral Gauge Boson Couplings in Effective Theories
• The decay Z -> neutrino antineutrino photon in the Standard Model
• Constraints on neutrino-photon interactions from rare Z decays
• Bounds on the magnetic moment and electric dipole moment of the $\tau$-neutrino via the process $e^{+}{e}^{-}\to \nu \bar{\nu }\gamma$
• Bounding the magnetic and electric dipole moments of tau nu from the process e+e- --> nu bar nu gamma in E6 Superstring Models
• Bounds on the dipole moments of the tau-neutrino via the process $e^{+}{e}^{-}\to \nu \bar{\nu }\gamma$ in a 331 model
• The Bounds on the magnetic moment of the tau-neutrino via the process (e+e-)-->nunu(bar)gamma