Garrido Beltrán, LluísGascón Fora, DavidGraciani Díaz, RicardoGraugés Pous, EugeniMarin Benito, CarlaPicatoste Olloqui, EduardoRives Molina, Vicente JoséBadalov, AlexeyLHCb Collaboration2017-07-122017-07-122016-04-210031-9007https://hdl.handle.net/2445/113721The first observation of the B0s→¯D0K0S decay mode and evidence for the B0s→¯D*0K0S decay mode are reported. The data sample corresponds to an integrated luminosity of 3.0  fb−1 collected in pp collisions by LHCb at center-of-mass energies of 7 and 8 TeV. The branching fractions are measured to be B(B0s→¯D0¯K0)=[4.3±0.5(stat)±0.3(syst)±0.3(frag)±0.6(norm)]×10−4,B(B0s→¯D*0¯K0)=[2.8±1.0(stat)±0.3(syst)±0.2(frag)±0.4(norm)]×10−4,where the uncertainties are due to contributions coming from statistical precision, systematic effects, and the precision of two external inputs, the ratio fs/fd and the branching fraction of B0→¯D0K0S, which is used as a calibration channel.9 p.application/pdfeng(c) American Physical Society, 2016Violació CP (Física nuclear)Simetria (Física)Partícules (Física nuclear)CP violation (Nuclear physics)Symmetry (Physics)Particles (Nuclear physics)info:eu-repo/semantics/article6699262017-07-12info:eu-repo/semantics/openAccess27152791