Measurement of B-->K*gamma Branching Fractions and Charge Asymmetries

Details Measurement of B-->K*gamma Branching Fractions and Charge Asymmetries Measurement of B-->K*gamma Branching Fractions and Charge Asymmetries

2001-10-26

arxiv.org/abs/hep-ex/0110065v1

Phys.Rev.Lett.88:101805,2002

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 3 figures, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.88.101805

The branching fractions of the exclusive decays $B^0\to K^{*0}\gamma$ and $B^+ \to K^{*+}\gamma$ are measured from a sample of $(22.74\pm 0.36)\times 10^6$ $B\bar B$ decays collected with the BABAR detector at the PEP II asymmetric $e^{+}e^{-}$ collider. We find ${\cal B}(B^0\to K^{*0}\gamma) = (4.23\pm 0.40({\rm stat.})\pm 0.22({\rm sys.}))\times 10^{-5}$, ${\cal B}(B^+\to K^{*+}\gamma) = (3.83\pm 0.62({\rm stat.})\pm 0.22({\rm sys.}))\times 10^{-5}$ and constrain the CP-violating charge asymmetry to be $-0.170 < A_{CP}(B \to K^*\gamma) < 0.082$ at 90% C.L.

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