Study of CP Asymmetry in B0-B-0 Mixing with Inclusive Dilepton Events

We present a measurement of the asymmetry ACP between same-sign inclusive dilepton samples [scriptl]+[scriptl]+ and [scriptl]-[scriptl]- ([scriptl]=e, mu ) from semileptonic B decays in Y(4S) arrow right BB- events, using the complete data set recorded by the BABAR experiment near the Y(4S) resonanc...

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Bibliographic Details
Published in:Physical review letters 2015-02, Vol.114 (8)
Main Author: Lees, J P
Format: Article
Language:English
Subjects:
Asymmetry
Decay
Experiment-HEP
HEPEX
NUCLEAR PHYSICS AND RADIATION 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 [scriptl]+[scriptl]+ and [scriptl]-[scriptl]- ([scriptl]=e, mu ) from semileptonic B decays in Y(4S) arrow right BB- events, using the complete data set recorded by the BABAR experiment near the Y(4S) resonance, corresponding to 471x106 BB- pairs. The asymmetry ACP allows comparison between the mixing probabilities P(B-0 arrow right B0) and P(B0 arrow right B-0), and therefore probes CP and T violation. The result, ACP=[-3.9+ or -3.5(stat) + or -1.9(syst)]x10-3, is consistent with the standard model expectation.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.114.081801