First measurement of time-dependent CP violation in B0 → K+K- decays
Direct and mixing-induced CP-violating asymmetries in B0 s → 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 7TeV. The results are CKK = 0.14 ± 0.11 ± 0.03 and SKK = 0.30 ± 0.12 ± 0.04, where the first uncertainties are statistical and the second systematic. The corresponding quantities are also determined for B0→π +π- decays to be Cππ = -0.38±0.15±0.02 and Sππ = -0.71±0. 13±0.02, in good agreement with existing measurements. Title: First measurement of time-dependent CP violation in B0 → K+K- decays Authors: Aaij, Roel Adeva, Bernardo Adinolfi, Marco,... Keywords: Physics CKM angle gamma CP violation Flavor physics Hadron-Hadron Scattering Issue Date: 2013 Publisher: H. : ĐHQGHN Abstract: Direct and mixing-induced CP-violating asymmetries in B0 s → K+K- decays are measured for th...