Search for lepton flavour violation at LHCb

被引：0

作者：

Molina, Vicente Rives ^{[1
]}

机构：

[1] Univ Barcelona, Marti & Franques 1, E-08028 Barcelona, Spain

来源：

NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS | 2016年 / 273卷

关键词：

lepton flavour violation; lepton number violation; Majorana neutrinos; Rare Decays; LHCb;

D O I：

10.1016/j.nuclphysbps.2015.09.400

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We report the first searches for lepton flavour violating tau decays at a hadron collider. In particular, a search for the decay tau -> mu mu mu is presented, using data corresponding to an integrated luminosity of 1.0 fb(-1) collected at 7 TeV by LHCb in 2011. The upper limit on the branching ratio could be set, B(tau(-) -> mu(+)mu(-)mu(-)) < 8.0 x 10(-8) at 90 % confidence level (the inclusion of the charge conjugate process is included). In addition, we report on the search for heavy Majorana neutrinos in lepton number violating B- -> mu(+)mu(-)mu(-) decay (as well as in its charge conjugate). In this case, the whole LHCb dataset is used (1.0 fb(-1) at root s = 7 TeV and 2 fb(-1) at root s = 8 TeV). No signal is found, and a limit on the branching ratio is set, B(B- -> mu(+)mu(-)mu(-)) < 4 x 10(-9) at 95 % confidence level. This limit is then used to set limits on the coupling between the hypothetical Majorana neutrino and muons.

引用

页码：2388 / 2390

页数：3

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