Phenomenology of neutral heavy leptons

Details Phenomenology of neutral heavy leptons Phenomenology of neutral heavy leptons

1996-12-20

arxiv.org/abs/hep-ph/9612439v1

Phys.Rev. D55 (1997) 1453-1465

Physics

High Energy Physics

High Energy Physics - Phenomenology

submitted to Phys. Rev. D, 30 pages, 9 figures (ps), REVTEX

Scientific paper

10.1103/PhysRevD.55.1453

We continue our previous work on the flavour-conserving leptonic decays of the Z boson with neutral heavy leptons (NHL's) in the loops by considering box, vertex, and self-energy diagrams for the muon decay. By inclusion of these loops (they contribute to the input parameter M_W) we can probe the full parameter space spanned by the so-called flavour-conserving mixing parameters ee_(mix), \mu\mu_(mix), \tau\tau_(mix) in a superstring-inspired model of neutrino mass. We compare the results of our analysis with the existing work in this field and conclude that flavour-conserving decays have certain advantages over traditionally considered flavour-violating ones.

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