Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-03-28
Phys.Rev.D52:3993-4005,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 24 pages, minor rewordings.
Scientific paper
10.1103/PhysRevD.52.3993
Motivated by the recent investigation of neutrinoless $\tau$-lepton decays by the CLEO collaboration, we perform a systematic analysis of such decays in a possible new-physics scenario with heavy Dirac/Majorana neutrinos, including heavy-neutrino nondecoupling effects, finite quark masses, and quark as well as meson mixings. We find that $\tau$-lepton decays into an electron or muon and a pseudoscalar or vector meson can have branching ratios close to the experimental sensitivity. Numerical estimates show that the predominant decay modes of this kind are $\tau^-\to e^-\phi$, $\tau^-\to e^-\rho^0$, and $\tau^-\to e^-\pi^0$, with branching ratios of order $10^{-6}$.
Ilakovac Amon
Kniehl Bernd A.
Pilaftsis Apostolos
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