Semileptonic lepton-number- and/or lepton-flavor-violating tau decays in Majorana neutrino models

被引：52

作者：

Ilakovac, A

Kniehl, BA

Pilaftsis, A

机构：

[1] MAX PLANCK INST PHYS & ASTROPHYS, D-80805 MUNICH, GERMANY

[2] RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND

来源：

PHYSICAL REVIEW D | 1995年 / 52卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.52.3993

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 and/or Majorana neutrinos, including heavy-neutrino nondecoupling effects, finite quark masses, and quark as well as meson mixings. We find that the 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(-) --> e(-) phi, tau(-) --> e(-) rho(0),and tau(-) --> e(-) pi(0), with branching ratios of the order of 10(-6).

引用

页码：3993 / 4005

页数：13

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