The first observation of the B_s^0→D[over ¯]^0K_S^0 decay mode and evidence for the B_s^0→D[over ¯]^*0K_S^0 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(B_s^0→D[over ¯]^0K[over ¯]^0)=[4.3±0.5(stat)±0.3(syst)±0.3(frag)±0.6(norm)]×10^-4,B(B_s^0→D[over ¯]^*0K[over ¯]^0)=[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 f_s/f_d and the branching fraction of B^0→D[over ¯]^0K_S^0, which is used as a calibration channel.

Observation of B_s^0→D[over ¯]^0K_S^0 and Evidence for B_s^0→D[over ¯]^*^0K_S^0 Decays

VELTRI, MICHELE;
2016-01-01

Abstract

The first observation of the B_s^0→D[over ¯]^0K_S^0 decay mode and evidence for the B_s^0→D[over ¯]^*0K_S^0 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(B_s^0→D[over ¯]^0K[over ¯]^0)=[4.3±0.5(stat)±0.3(syst)±0.3(frag)±0.6(norm)]×10^-4,B(B_s^0→D[over ¯]^*0K[over ¯]^0)=[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 f_s/f_d and the branching fraction of B^0→D[over ¯]^0K_S^0, which is used as a calibration channel.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11576/2642603
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