We have studied the B+/--->J/psipi(+/-) and B+/--->J/psiK(+/-) decays using a 20.7 fb(-1) data set collected with the BABAR detector. We observe a signal of 51+/-10 B+/--->J/psipi(+/-) events and determine the ratio B(B+/--->J/psipi(+/-))/B(B+/--->J/psiK(+/-)) to be [3.91+/-0.78(stat)+/-0.19(syst)]%. The CP-violating charge asymmetries for the B+/--->J/psipi(+/-) and B+/--->J/psiK(+/-) decays are determined to be A(pi)=0.01+/-0.22(stat)+/-0.01(syst) and A(K)=0.003+/-0.030(stat)+/-0.004(syst).
Study of B-+/--> J/psi pi(+/-) and B-+/--> J/psi K-+/- decays: Measurement of the ratio of branching fractions and search for direct CP-violating charge asymmetries RID C-2728-2008 RID C-5223-2009 RID C-5719-2008 RID D-1189-2011 RID A-2675-2009
ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;FORTI, FRANCESCO;GIORGI, MARCELLO;PAOLONI, EUGENIO;RIZZO, GIULIANA;TRIGGIANI, GIUSEPPE;CALDERINI, GIOVANNI;
2002-01-01
Abstract
We have studied the B+/--->J/psipi(+/-) and B+/--->J/psiK(+/-) decays using a 20.7 fb(-1) data set collected with the BABAR detector. We observe a signal of 51+/-10 B+/--->J/psipi(+/-) events and determine the ratio B(B+/--->J/psipi(+/-))/B(B+/--->J/psiK(+/-)) to be [3.91+/-0.78(stat)+/-0.19(syst)]%. The CP-violating charge asymmetries for the B+/--->J/psipi(+/-) and B+/--->J/psiK(+/-) decays are determined to be A(pi)=0.01+/-0.22(stat)+/-0.01(syst) and A(K)=0.003+/-0.030(stat)+/-0.004(syst).File in questo prodotto:
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