Search for the lepton flavour violating decay \(\tau^-\to \mu^-\mu^+\mu^-\)

• Published in: arXiv.org
• Main Authors: collaboration, LHCb, Amato, S, Andreotti, M, Baldini, W, Barsuk, S, Batozskaya, V, Beddow, J, Bedeschi, F, Ben-Haim, E, Bencivenni, G, Bernet, R, Bien, A, Blusk, S, Bondar, N, Britton, T, Cadeddu, S, Charpentier, Ph, S -F Cheung, Ciezarek, G, Clarke, P E L, Coco, V, Contu, A, Cowan, G A, De Paula, L, Donleavy, S, Easo, S, H -M Evans, Farinelli, C, Gandelman, M, Garrido, L, Graugés, E, Gys, T, Hampson, T, Han, X, Hennessy, K, Hill, D, Idzik, M, Ketel, T, Kolpin, M, Komarov, I, Lacarrere, D, Lafferty, G, Langhans, B, Lohn, S, Lupton, O, Mapelli, A, Matev, R, Meissner, M, J Molina Rodriguez, Mordà, A, Morello, M J, Neufeld, N, Nguyen, A D, Nikodem, T, Onderwater, G, Otto, A, Oyanguren, A, Papanestis, A, Pearce, A, Playfer, S, Poluektov, A, Popov, A, Price, J D, Prouve, C, A Puig Navarro, Rademacker, J H, Rangel, M S, Raniuk, I, Reid, M M, dos Reis, A C, Ricciardi, S, Rinnert, K, Schiller, M, Serra, N, Shcheglov, Y, Sirendi, M, Skillicorn, I, Soler, F J P, Soomro, F, Stagni, F, Stenyakin, O, Stroili, R, Szczypka, P, Szilard, D, Teklishyn, M, Topp-Joergensen, S, Torr, N, Tran, M T, M Vieites Diaz, Vilasis-Cardona, X, Vorobyev, V, Walsh, J, Watson, N K, Wilschut, H W, Wishahi, J, Witek, M, Wormser, G, Wotton, S A, Xing, Z, Zhong, L
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 01.04.2015
• Subjects: Confidence intervals; Decay; Large Hadron Collider; Leptons; Luminosity; Particle collisions
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1409.8548

A search for the lepton flavour violating decay \(\tau^-\to \mu^-\mu^+\mu^-\) is performed with the LHCb experiment. The data sample corresponds to an integrated luminosity of \(1.0\mathrm{\,fb}^{-1}\) of proton-proton collisions at a centre-of-mass energy of \(7\mathrm{\,Te\kern -0.1em V}\) and \(2.0\mathrm{\,fb}^{-1}\) at \(8\mathrm{\,Te\kern -0.1em V}\). No evidence is found for a signal, and a limit is set at \(90\%\) confidence level on the branching fraction, \(\mathcal{B}(\tau^-\to \mu^-\mu^+\mu^-) < 4.6 \times 10^{-8}\).