The branching fractions of the decays B-0-->K(*0)gamma and B+-->K(*+)gamma are measured using a sample of 88x10(6)B(B) over bar events collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider. We find B(B-0-->K(*0)gamma)=[3.92+/-0.20(stat)+/-0.24(syst)]x10(-5), B(B+-->K(*+)gamma)=[3.87+/-0.28(stat)+/-0.26(syst)]x10(-5). Our measurements also constrain the direct CP asymmetry to be -0.074<A(B-->K(*)gamma)<0.049 and the isospin asymmetry to be -0.046<Delta(0-)<0.146, both at the 90% confidence level.
Measurement of branching fractions and CP and isospin asymmetries for B -> K-*gamma
ANDREOTTI, Mirco;AZZOLINI, Virginia;CALABRESE, Roberto;CIBINETTO, Gianluigi;LUPPI, Eleonora;NEGRINI, Matteo;SARTI, Alessio;
2004
Abstract
The branching fractions of the decays B-0-->K(*0)gamma and B+-->K(*+)gamma are measured using a sample of 88x10(6)B(B) over bar events collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider. We find B(B-0-->K(*0)gamma)=[3.92+/-0.20(stat)+/-0.24(syst)]x10(-5), B(B+-->K(*+)gamma)=[3.87+/-0.28(stat)+/-0.26(syst)]x10(-5). Our measurements also constrain the direct CP asymmetry to be -0.074File in questo prodotto:
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