Study of CP Asymmetry in B[superscript 0]−[bar over B][superscript 0] Mixing with Inclusive Dilepton Events
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PhysRevLett.114.081801.pdf
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Author(s)
Lees, J. P.
Poireau, V.
Tisserand, V.
Grauges, E.
Palano, A.
Eigen, G.
Stugu, B.
Brown, D. N.
Kerth, L. T.
Kolomensky, Yu. G.
Date Issued
February 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Lees, J. P. et al. “Study of CP Asymmetry in B[superscript 0]−[bar over B][superscript 0] Mixing with Inclusive Dilepton Events.” Physical Review Letters 114.8 (2015). © 2015 American Physical Society
Version
Final published version
Abstract
We present a measurement of the asymmetry A[subscript CP] between same-sign inclusive dilepton samples ℓ[superscript +]ℓ[superscript +] and ℓ[superscript −]ℓ[superscript −] (ℓ=e, μ) from semileptonic B decays in Υ(4S)→B[bar over B] events, using the complete data set recorded by the BABAR experiment near the Υ(4S) resonance, corresponding to 471×10[superscript 6] B[bar over B] pairs. The asymmetry A[subscript CP] allows comparison between the mixing probabilities P([bar over B][superscript 0]→B[superscript 0]) and P(B[superscript 0]→[bar over B][superscript 0]), and therefore probes CP and T violation. The result, A[subscript CP]=[−3.9±3.5(stat)±1.9(syst)]×10[superscript −3], is consistent with the standard model expectation.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.114.081801
