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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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http://hal.in2p3.fr/in2p3-01081898
Contributor : Sabine Starita <>
Submitted on : Wednesday, November 12, 2014 - 10:31:02 AM
Last modification on : Wednesday, September 16, 2020 - 4:27:51 PM

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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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