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

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. T...

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Bibliographic Details
Published in:Physical review letters 2015, Vol.114 (8)
Main Authors: Lees, J. P., Poireau, V., Tisserand, V., Arnaud, N., Davier, M., Derkach, D., Grosdidier, G., Le Diberder, F., Lutz, A. M., Malaescu, B., Roudeau, P., Stocchi, A., Wormser, G.
Format: Article
Language:English
Subjects:
High Energy Physics - Experiment
Physics
Online Access:Get full text
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.114.081801