出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We report preliminary measurements on charmless charged two-body and open-charm charged B hadron decay modes, using an integrated luminosity of 0.32 fb−1 collected by LHCb in the first part of the 2011 run, the direct CP asymmetries ACP(B0 !Kp) = −0.088±0.011±0.008 and ACP(B0s ! pK) = 0.27±0.08±0.02 is measured. Furthermore, the branching fractions BR(B0!K+K−)=(0.13+0.06 −0.05±0.07)×10−6 and BR(B0s !p+p−)=(0.98+0.23 −0.19±0.11)×10−6 is measured. Using an integrated luminosity of 37 pb−1 collected by LHCb in 2010, the ratio of two Bu hadronic branching fractions BR(B± ! DK±)/BR(B± ! Dp±) is measured for events in which the D meson is reconstructed in several final states. Using the Cabibbo-favored decays D0 ! K−p+ and D0 ! K−p+p−p+, the ratio is measured as (6.30±0.38±0.40)%. It is determined to be (9.31±1.89±0.53)% in the CP eigenstate mode D!K+K− and (12+6 −5 ±1)% in the D!K0 s p+p− channel. We also provide a preliminary value of the g-sensitive observable: RCP+ = 1.48±0.31±0.12.
