The decay Z -> neutrino antineutrino photon in the Standard Model

Details The decay Z -> neutrino antineutrino photon in the Standard Model The decay Z -> neutrino antineutrino photon in the Standard Model

1999-03-17

arxiv.org/abs/hep-ph/9903391v1

Phys.Rev. D60 (1999) 013004

Physics

High Energy Physics

High Energy Physics - Phenomenology

REVTEX,15 pp, 5 eps figures, Approved for publication in Physical Review D

Scientific paper

10.1103/PhysRevD.60.013004

A complete study of the one-loop induced decay Z -> neutrino antineutrino photon is presented within the framework of the Standard Model. The advantages of using a nonlinear gauge are stressed. We have found that the main contributions come from the electric dipole and the magnetic dipole transitions of the Z gauge boson and the neutrino, respectively. We obtain a branching ratio B=7.16E-10, which is about four orders of magnitude smaller than the bound recentely obtained by the L3 collaboration and thus it leaves open a window to search for new physics effects in single-photon decays of the Z boson.

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