Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-08-02
Phys.Rev. D54 (1996) 5653-5673
Physics
High Energy Physics
High Energy Physics - Phenomenology
33 pages, LaTeX, 6 Postscript figures. To appearin Phys. Rev. D
Scientific paper
10.1103/PhysRevD.54.5653
The evaluation, systematic analysis and numerical study of the semileptonic $\tau$-lepton decays with two mesons in the final state has been made in the frame of the standard model extended by right handed neutrinos. In the analysis, heavy-neutrino nondecoupling effects, finite quark masses, quark and meson mixings, finite widths of vector mesons, chiral symmetry breakings in vector-meson--pseudoscalar-meson vertices and effective Higgs-boson--pseudoscalar-meson couplings have been included. Numerical estimates reveal that the decays $\tau^-\to e^-\pi^-\pi^+$, $\tau^-\to e^-K^-K^+$ and $\tau^-\to e^-K^0\bar{K}^0$ have branching ratios of the order of $10^{-6}$, close to present-day experimental sensitivities.
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