Heavy-Neutrino Effects on tau-Lepton Decays

Details Heavy-Neutrino Effects on tau-Lepton Decays Heavy-Neutrino Effects on tau-Lepton Decays

1994-10-31

arxiv.org/abs/hep-ph/9410412v1

Mod.Phys.Lett.A9:3595-3604,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages (1 Figure), based on a contribution submitted to ichep94, LaTeX, RAL/94-113

Scientific paper

10.1142/S0217732394003439

Minimal extensions of the Standard Model that are motivated by grand unified theories or superstring models with an E_6 symmetry can naturally predict heavy neutrinos of Dirac or Majorana nature. Such heavy neutral leptons violate the de- coupling theorem at the one-loop electroweak order and hence offer a unique chance for possible lepton-flavour decays of the tau lepton, e.g. tau -> eee or tau -> mu mu mu, to be seen in LEP experiments. We analyze such decays in models with three and four generations.

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