Search for the lepton flavour violating decay τ− → μ−μ+μ−

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Title:	Search for the lepton flavour violating decay τ− → μ−μ+μ−
Author:	Gascón Fora, David; Graciani Díaz, Ricardo; Graugés Pous, Eugeni; Picatoste Olloqui, Eduardo; Rives Molina, Vicente José; Ruiz, Hugo (Ruiz Pérez); LHCb Collaboration
Other authors:	Universitat de Barcelona
Abstract:	A search for the lepton flavour violating decay τ−→μ−μ+μ− is performed with the LHCb experiment. The data sample corresponds to an integrated luminosity of 1.0fb−1 of proton-proton collisions at a centre-of-mass energy of 7TeV and 2.0fb−1 at 8TeV. No evidence is found for a signal, and a limit is set at 90% confidence level on the branching fraction, B(τ−→μ−μ+μ−)<4.6×10−8.
Subject(s):	-Acceleradors de partícules -Leptons (Física nuclear) -Violació CP (Física nuclear) -Particle accelerators -Leptons (Nuclear physics) -CP violation (Nuclear physics)
Rights:	cc-by (c) LHCb Collaboration et al., 2015 http://creativecommons.org/licenses/by/3.0/es
Document type:	Article Article - Published version
Published by:	Springer Verlag
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