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Measurement of CP Violation in B[superscript 0] → J / ψ K[superscript 0][subscript S] Decays

Author(s)
Counts, Ian Thomas Hunt; Ilten, Philip J; Williams, Michael
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Abstract
Measurements are presented of the CP violation observables S and C in the decays of B[superscript 0] and [bar over B][superscript 0] mesons to the J/ψK[superscript 0][subscript S] final state. The data sample corresponds to an integrated luminosity of 3.0fb[superscript -1] collected with the LHCb experiment in proton-proton collisions at center-of-mass energies of 7 and 8 TeV, and contains a total of 41560 selected B[superscript 0] and [bar over B][superscript 0] decays. The analysis of the time evolution of these decays yields S = 0.731 ± 0.035(stat) ± 0.020(syst) and C = -0.038 ± 0.032(stat)± 0.005(syst). In the standard model, S equals sin(2β) to a good level of precision. The values are consistent with the current world averages and with the standard model expectations.
Date issued
2015-07
URI
http://hdl.handle.net/1721.1/115946
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Aaij, R., et al. “Measurement of C P Violation in B[superscript 0'] → J / ψ K[superscript 0][subscript S] Decays.” Physical Review Letters, vol. 115, no. 3, July 2015. © 2015 CERN, for the LHCb Collaboration
Version: Final published version
ISSN
0031-9007
1079-7114

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