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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/56384
First measurement of time-dependent CP violation in B0s→K+K− decays
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Direct and mixing-induced CP-violating asymmetries in B0s→K+K− decays are measured for the first time using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb−1, collected with the LHCb detector at a centre-of-mass energy of 7 TeV. The results are C KK = 0.14 ± 0.11 ± 0.03 and S KK = 0.30 ± 0.12 ± 0.04, where the first uncertainties are statistical and the second systematic. The corresponding quantities are also determined for B 0 → π + π − decays to be C ππ = −0.38 ± 0.15 ± 0.02 and S ππ = −0.71 ± 0.13 ± 0.02, in good agreement with existing measurements.
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CALVO GÓMEZ, Míriam, et al. First measurement of time-dependent CP violation in B0s→K+K− decays. Journal of High Energy Physics. 2013. Vol. 183, num. 1-26. ISSN 1126-6708. [consulted: 15 of August of 2026]. Available at: https://hdl.handle.net/2445/56384