Abstract
The first measurement of decay-time-dependent CP asymmetries in the decay B0s → J/ψK0S and an updated measurement of the ratio of branching fractions ℬ(B0s → J/ψK0S)/ℬ(B0 → J/ψK0S) are presented. The results are obtained using data corresponding to an integrated luminosity of 3.0 fb−1 of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The results on the CP asymmetries are A∆Γ(B0s → J/ψK0S) = 0.49 ±0.77 0.65(stat) ± 0.06(syst), Cdir(B0s → J/ψK0S) = −0.28 ± 0.41(stat) ± 0.08(syst), Smix(B0s → J/ψK0S) = −0.08 ± 0.40(stat) ± 0.08(syst). The ratio B(B0s → J/ψK0S)/B(B0 → J/ψK0S) is measured to be 0.0431 ± 0.0017(stat) ± 0.0012(syst) ± 0.0025(fs/fd), where the last uncertainty is due to the knowledge of the B0s and B0 production fractions.
Original language | English |
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Article number | 131 |
Number of pages | 22 |
Journal | Journal of High Energy Physics |
Volume | 2015 |
Issue number | 6 |
DOIs | |
Publication status | Published - 18 Jun 2015 |
Keywords
- B physics
- Branching fraction
- CP violation
- Flavor physics
- Hadron-Hadron Scattering
ASJC Scopus subject areas
- Nuclear and High Energy Physics