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  • Study of CP asymmetry in B^{0}-B[over ¯]^{0} mixing with inclusive dilepton events
    Lees, J P; Tisserand, V; Stugu, B; Kerth, L T; Kolomensky, Yu G; Lee, M J; Hearty, C; McKenna, J A; Skovpen, Yu I; Campagnari, C; Kovalskyi, D; West, C A; Eisner, A M; Echenard, B; Hitlin, D G; Ongmongkolkul, P; Huard, Z; Sokoloff, M D; Sun, L; Bloom, P C; Wagner, S R; Toki, W H; Spaan, B; Playfer, S; Finocchiaro, G; Robutti, E; Bhuyan, B; Prasad, V; Adametz, A; Uwer, U; Lacker, H M; Chen, C; Ahmed, H; Gritsan, A V; Le Diberder, F; Malaescu, B; Gabathuler, E; Cowan, G; Fritsch, M; Griessinger, K; Hafner, A; Jawahery, A; Roberts, D A; Cheaib, R; Robertson, S H; Sonnek, P; De Nardo, G; Jessop, C P; Kass, R; Morandin, M; Simi, G; Akar, S; Ben-Haim, E; Leruste, Ph; Biasini, M; Rossi, A; Carpinelli, M; Casarosa, G; Cervelli, A; Giorgi, M A; Paoloni, E; Walsh, J J; Lopes Pegna, D; Faccini, R; Ferrarotto, F; Ferroni, F; Dittrich, S; Adye, T; Dunwoodie, W; Field, R C; Kim, P; Lindemann, D; Luth, V; MacFarlane, D B; Ratcliff, B N; Salnikov, A A; Schindler, R H; Wisniewski, W J; Purohit, M V; Sekula, S J; Bellis, M; Burchat, P R; Puccio, E M T; Ernst, J A; Guttman, N; Ritchie, J L; Ruland, A M; Wray, B C; Lou, X C; De Mori, F; Filippi, A; Vitale, L; Bernlochner, F U; Choi, H H F; Nugent, I M; Harrison, P F; Latham, T E; Band, H R; Prepost, R; Wu, S L

    Physical review letters, 2015-Feb-27, 20150227, Letnik: 114, Številka: 8
    Journal Article

    We present a measurement of the asymmetry A_{CP} between same-sign inclusive dilepton samples ℓ^{+}ℓ^{+} and ℓ^{-}ℓ^{-} (ℓ=e, μ) from semileptonic B decays in ϒ(4S)→BBover ¯ events, using the complete data set recorded by the BABAR experiment near the ϒ(4S) resonance, corresponding to 471×10^{6} BBover ¯ pairs. The asymmetry A_{CP} allows comparison between the mixing probabilities P(Bover ¯^{0}→B^{0}) and P(B^{0}→Bover ¯^{0}), and therefore probes CP and T violation. The result, A_{CP}=-3.9±3.5(stat)±1.9(syst)×10^{-3}, is consistent with the standard model expectation.

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