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

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Aaij Roel et al. (LHCb collaboration),
Project Rare decays of B-mesons and the physics of the early Universe
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Original article (peer-reviewed)

Journal Journal of High Energy Physics
Page(s) 121
Title of proceedings Journal of High Energy Physics

Open Access

URL http://arxiv.org/abs/1409.8548
Type of Open Access Repository (Green Open Access)

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, (τ−→μ−μ+μ−)<4.6×10−8.
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