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    Adametz, A.; Adrover, C.; Ajaltouni, Z.; Alessio, F.; Anderlini, L.; Gutierrez, O. Aquines; Aslanides, E.; Baldini, W.; Benson, S.; Berezhnoy, A.; Blusk, S.; Bocci, V.; Bonivento, W.; Borghi, S.; Brambach, T.; Britsch, M.; Brown, H.; Cardinale, R.; Cattaneo, M.; Ciezarek, G.; Corti, G.; Craik, D.; D’Ambrosio, C.; Dovbnya, A.; Dziurda, A.; Ekelhof, R.; Filippov, S.; Fontana, M.; Forty, R.; Frosini, M.; Galli, D.; Gaspar, C.; Ghez, Ph; Graziani, G.; Hansmann-Menzemer, S.; Harrison, J.; Morata, J. A. Hernando; Hopchev, P.; Hussain, N.; Khanji, B.; Koppenburg, P.; Krocker, G.; Lambert, D.; Latham, T.; Lesiak, T.; Liles, M.; von Loeben, J.; Lopes, J. H.; Raighne, A. Mac; Machefert, F.; Machikhiliyan, I. V.; Malde, S.; Martinelli, M.; Massafferri, A.; McCarthy, J.; McNulty, R.; Mountain, R.; Müller, K.; Muryn, B.; Mylroie-Smith, J.; Nakada, T.; Neufeld, N.; Okhrimenko, O.; Penso, G.; Altarelli, M. Pepe; Perret, P.; Valls, B. Pie; Playfer, S.; Raniuk, I.; Rauschmayr, N.; Rinnert, K.; Robbe, P.; Vidal, A. Romero; Rosello, M.; Sabatino, G.; Silva, J. J. Saborido; Sagidova, N.; Santacesaria, R.; Santovetti, E.; Schmidt, B.; Schwemmer, R.; Sepp, I.; Seyfert, P.; Soler, F. J. P.; Szczekowski, M.; Thomas, E.; Tobin, M.; Topp-Joergensen, S.; Torr, N.; Garcia, M. Ubeda; Voong, D.; Voß, C.; Wandernoth, S.; Whitehead, M.; Wishahi, J.; Yang, Z.; Yuan, X.; Yushchenko, O.; Zangoli, M.; Zvyagin, A.

    The journal of high energy physics, 12/2012, Letnik: 2012, Številka: 12
    Journal Article

    A bstract A discovery of the rare decay B + → π + μ + μ − is presented. This decay is observed for the first time, with 5.2 σ significance. The observation is made using pp collision data, corresponding to an integrated luminosity of 1.0 fb −1 , collected with the LHCb detector. The measured branching fraction is (2.3 ± 0.6 (stat.) ± 0.1 (syst.))×10 −8 , and the ratio of the B + → π + μ + μ − and B + → K + μ + μ − branching fractions is measured to be 0.053 ± 0.014 (stat.) ± 0.001 (syst.).