Measurement of CP Violation in B[superscript 0] → J/ψK[0 over S] Decays
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PhysRevLett.115.031601.pdf
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320.15 KB
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Checksum (MD5)
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Affolder, A.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Date Issued
July 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R., et al. "Measurement of CP Violation in B[superscript 0] → J/ψK[0 over S] Decays." Phys. Rev. Lett. 115, 031601 (July 2015). © 2015 CERN, for the LHCb Collaboration
Version
Final published version
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[0 over S] final state. The data sample corresponds to an integrated luminosity of 3.0 fb[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 41 560 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.115.031601
