Study of CP asymmetry in B0-B0bar mixing with inclusive dilepton events

Abstract : We present a measurement of the asymmetry ACP between same-sign inclusive dilepton samples ℓ+ℓ+ and ℓ−ℓ− (ℓ=e,μ) from semileptonic B decays in Y(4S) --> BBbar events, using the complete data set recorded by the BABAR experiment near the Y(4S) resonance, corresponding to 471 million BBbar pairs. The asymmetry A_{CP} allows comparison between the mixing probabilities P(B0bar --> B0) and P(B0 --> B0bar), and therefore probes CP and T violation. The result, ACP=(−3.9±3.5(stat)±1.9(syst))×10−3, is consistent with the Standard Model expectation.
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Physical Review Letters, American Physical Society, 2015, 114 (8), pp.081801. 〈10.1103/PhysRevLett.114.081801〉
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http://hal.in2p3.fr/in2p3-01081898
Contributeur : Sabine Starita <>
Soumis le : mercredi 12 novembre 2014 - 10:31:02
Dernière modification le : jeudi 11 janvier 2018 - 06:14:20

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J. P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Study of CP asymmetry in B0-B0bar mixing with inclusive dilepton events. Physical Review Letters, American Physical Society, 2015, 114 (8), pp.081801. 〈10.1103/PhysRevLett.114.081801〉. 〈in2p3-01081898〉

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