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Measurement of CP violation in B0→J/ψK0S decays

Abstract : Measurements are presented of the CP violation observables S and C in the decays of B0 and B¯¯¯0 mesons to the J/ψK0S final state. The data sample corresponds to an integrated luminosity of 3.0fb−1 collected with the LHCb experiment in proton-proton collisions at center-of-mass energies of 7 and 8TeV. The analysis of the time evolution of 41500 B0 and B¯¯¯0 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.
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Submitted on : Wednesday, March 25, 2015 - 5:19:11 PM
Last modification on : Thursday, December 16, 2021 - 2:11:20 PM

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R. Aaij, Y. Amhis, S. Barsuk, M. Borsato, O. Kochebina, et al.. Measurement of CP violation in B0→J/ψK0S decays. Physical Review Letters, American Physical Society, 2015, 115 (3), pp.031601. ⟨10.1103/PhysRevLett.115.031601⟩. ⟨in2p3-01135713⟩



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