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
收藏
页码：3993 / 4005
页数：13
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