The branching fractions of the exclusive decays B-0 --> K*(0)gamma and B+ --> K*(+)gamma are measured. from a sample of (22.74 +/- 0.36) x 10(6) B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric e(+)e(-) collider. We find B(B-0 --> K*(0)gamma) = [4.23 +/- 0.40(stat) +/- 0.22(syst)] x 10(-5), B(B+ --> K*(+)gamma) = [3.83 +/- 0.62(stat) 0.22(syst)] X 10-5 and constrain the CP-violating charge asymmetry to be -0.170 < A(CP)(B --> K*gamma) < 0.082 at 90% C.L.
Measurement of B -> K-* gamma branching fractions and charge asymmetries RID C-2728-2008 RID A-2675-2009 RID C-5223-2009 RID C-5719-2008 RID A-8865-2012 RID D-1189-2011
LUSIANI, Alberto;
2002
Abstract
The branching fractions of the exclusive decays B-0 --> K*(0)gamma and B+ --> K*(+)gamma are measured. from a sample of (22.74 +/- 0.36) x 10(6) B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric e(+)e(-) collider. We find B(B-0 --> K*(0)gamma) = [4.23 +/- 0.40(stat) +/- 0.22(syst)] x 10(-5), B(B+ --> K*(+)gamma) = [3.83 +/- 0.62(stat) 0.22(syst)] X 10-5 and constrain the CP-violating charge asymmetry to be -0.170 < A(CP)(B --> K*gamma) < 0.082 at 90% C.L.File in questo prodotto:
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