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

• Main Authors: Counts, Ian Thomas Hunt (Contributor), Ilten, Philip J (Contributor), Williams, Michael (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society (APS), 2018-05-29T18:40:42Z.
• Subjects: Article
• Online Access: Get fulltext

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.
National Science Foundation (U.S.)