Measurement of the time-dependent CP asymmetry in B0 → J/ψ K0S decays

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Abstract

This Letter reports a measurement of the CP violation observables S J/ψK0S and C J/ψK0S in the decay channel B0 → J/ψ K0S performed with 1.0 fb-1 of pp collisions at √s = 7 TeV collected by the LHCb experiment. The fit to the data yields S J/ψ K0 S = 0.73 ± 0.07 (stat) ± 0.04 (syst) and C J/ψK0S = 0.03 ± 0.09 (stat) ± 0.01 (syst). Both values are consistent with the current world averages and within expectations from the Standard Model. © 2013 CERN.

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Aaij, R., Abellan Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., … Zvyagin, A. (2013). Measurement of the time-dependent CP asymmetry in B0 → J/ψ K0S decays. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 721(1–3), 24–31. https://doi.org/10.1016/j.physletb.2013.02.054

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