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  • Beteta, C. Abellán; Amato, S; Andreotti, M; Appleby, R. B; Baldini, W; Barlow, R. J; Barsuk, S; Batozskaya, V; Beddow, J; Bedeschi, F; Ben-Haim, E; Bencivenni, G; Bernet, R; Bien, A; Blusk, S; Bondar, N; Bowcock, T. J. V; Britton, T; Cadeddu, S; Gomez, M. Calvo; Akiba, K. Carvalho; Charpentier, Ph; Vidal, X. Cid; Ciezarek, G; Coco, V; Contu, A; De Paula, L; Donleavy, S; Easo, S; Rifai, I. El; Farinelli, C; Torreira, A. Gallas; Gandelman, M; Pardiñas, J. García; Garrido, L; Gligorov, V. V; Graugés, E; Gys, T; Haines, S. C; Hampson, T; Han, X; Hennessy, K; Hill, D; Idzik, M; Kenyon, I. R; Ketel, T; Kolpin, M; Komarov, I; Lacarrere, D; Lafferty, G; Langhans, B; Lees, J. -P; Lohn, S; Lupton, O; Machikhiliyan, I. V; Mapelli, A; Matev, R; Meissner, M; Mordà, A; Neufeld, N; Niess, V; Nikodem, T; Onderwater, G; Otto, A; Oyanguren, A; Papanestis, A; Pearce, A; Trigo, E. Perez; Playfer, S; Poluektov, A; Popov, A; Prouve, C; Raniuk, I; Reis, A. C. dos; Ricciardi, S; Rinnert, K; Satta, A; Saunders, D. M; Schiller, M; Serra, N; Shcheglov, Y; Coutinho, R. Silva; Sirendi, M; Skillicorn, I; Souza, D; Storaci, B; Teklishyn, M; Topp-Joergensen, S; Tourneur, S; Regueiro, P. Vazquez; Volyanskyy, D; Voss, H; Wiedner, D; Williams, M. P; Wormser, G; Xie, Y; Xing, Z; Zavertyaev, M; Zhang, L; Zhong, L

    09/2014
    Journal Article

    JHEP 02 (2015) 121 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, $\mathcal{B}(\tau^-\to \mu^-\mu^+\mu^-) < 4.6 \times 10^{-8}$.