Universality-Breaking Effects in Leptonic Z Decays

Details Universality-Breaking Effects in Leptonic Z Decays Universality-Breaking Effects in Leptonic Z Decays

1993-07-19

arxiv.org/abs/hep-ph/9307295v1

Phys.Rev.Lett. 71 (1993) 2695-2698

Physics

High Energy Physics

High Energy Physics - Phenomenology

MZ-TH/93-04 #, LaTeX, 14 p. (2 Figs)

Scientific paper

10.1103/PhysRevLett.71.2695

We analyze the possibility of universality violation in diagonal leptonic
decays of the $Z$ boson, in the context of interfamily "see-saw" models. In a
minimal extension of the Standard Model with right-handed neutrino fields, we
find that universality-breaking effects increase quadratically with the heavy
Majorana neutrino mass and may be observed in the running $LEP$ experiments.

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