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  • Measurement of the semileptonic CP asymmetry in B0-B[over ¯]0 mixing
    Ali, S; Aquines Gutierrez, O; Barsuk, S; Ben-Haim, E; Bien, A; Bifani, S; Bjørnstad, P M; Blake, T; Bowen, E; Britsch, M; Brodzicka, J; Cadeddu, S; Castillo Garcia, L; Cauet, Ch; Cenci, R; Chefdeville, M; Cheung, S-F; Chiapolini, N; Chrzaszcz, M; Coco, V; Comerma-Montells, A; Corti, G; Craik, D C; De Capua, S; De Miranda, J M; Del Buono, L; Di Canto, A; Dosil Suárez, A; Dreimanis, K; Firlej, M; Frank, M; Galli, D; Gao, Y; Gavardi, L; Gershon, T; Golutvin, A; Grabalosa Gándara, M; Graziani, G; Gregson, S; Han, X; Harnew, N; He, J; Henrard, P; Hicheur, A; Hussain, N; Jalocha, J; Kanso, W; Lambert, R W; Luppi, E; Machefert, F; Marconi, U; McSkelly, B; Molina Rodriguez, J; Morandin, M; Morawski, P; Mountain, R; Nandakumar, R; Needham, M; Neufeld, N; Nicol, M; Novoselov, A; Patel, G D; Patel, M; Perret, P; Pescatore, L; Pilař, T; Playfer, S; Price, J D; Raven, G; Rodrigues, A B; Saitta, B; Salustino Guimaraes, V; Sanmartin Sedes, B; Satta, A; Schlupp, M; Schmidt, B; Schopper, A; Semennikov, A; Shevchenko, V; Sirendi, M; Smith, N A; Smith, E; Smith, J; Stoica, S; Stone, S; Swientek, S; Szczekowski, M; Teubert, F; van Tilburg, J; Vacca, C; Vecchi, S; Volyanskyy, D; Voß, C; Waldi, R; Wandernoth, S; Wilkinson, M; Williams, M P; Wilschut, H W; Zhang, L; Zhelezov, A

    Physical review letters, 2015-Jan-30, Letnik: 114, Številka: 4
    Journal Article

    The semileptonic CP asymmetry in B0-Bover ¯0 mixing, a(sl)(d), is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0  fb-1, recorded by the LHCb experiment. Semileptonic B0 decays are reconstructed in the inclusive final states D-μ+ and D*-μ+, where the D- meson decays into the K+π-π- final state and the D*- meson into the Dover ¯0(→K+π-)π- final state. The asymmetry between the numbers of D(*)-μ+ and D(*)+μ- decays is measured as a function of the decay time of the B0 mesons. The CP asymmetry is measured to be a(sl)(d)=(-0.02±0.19±0.30)%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of a(sl)(d) to date and is consistent with the prediction from the standard model.

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