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

Lees, J. P.

doi:10.1103/PhysRevLett.114.081801

Title: Study of $C P$ Asymmetry in $B^{0} - {\bar{B}}^{0}$ Mixing with Inclusive Dilepton Events

Journal Article · Sun Feb 01 00:00:00 EST 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.114.081801· OSTI ID:1165919

Lees, J. P. ^[1]

et al.

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)→BB¯ events, using the complete data set recorded by the BABAR experiment near the Υ(4S) resonance, corresponding to 471×10⁶ BB¯ pairs. The asymmetry A_CP allows comparison between the mixing probabilities P(B¯⁰→B⁰) and P(B⁰→B¯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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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); High Energy Physics (HEP); National Science Foundation (NSF)

Contributing Organization:: BABAR Collaboration

DOE Contract Number:: AC02-76SF00515

OSTI ID:: 1165919

Report Number(s):: SLAC-PUB-15983; PRLTAO; arXiv:1411.1842

Journal Information:: Physical Review Letters, Vol. 114, Issue 8; ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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Title: Study of C P Asymmetry in B 0 - B ¯ 0 Mixing with Inclusive Dilepton Events

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Title: Study of $C P$ Asymmetry in $B^{0} - {\bar{B}}^{0}$ Mixing with Inclusive Dilepton Events