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Measurement of B --> K*gamma branching fractions and charge asymmetries |
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| Authors: | Aubert B Boutigny D Gaillard J-M Hicheur A Karyotakis Y Lees J P Robbe P Tisserand V Palano A Chen G P Chen J C Qi N D Rong G Wang P Zhu Y S Eigen G Reinertsen P L Stugu B Abbott B Abrams G S Borgland A W Breon A B Brown D N Button-Shafer J Cahn R N Clark A R Gill M S Gritsan A V Groysman Y Jacobsen R G Kadel R W Kadyk J Kerth L T Kluth S Kolomensky Yu G Kral J F LeClerc C Levi M E Liu T Lynch G Meyer A B Momayezi M Oddone P J Perazzo A Pripstein M Roe N A Romosan A Ronan M T Shelkov V G Telnov A V Wenzel W A Zisman M S Bright-Thomas P G Harrison T J Hawkes C M Knowles D J O'Neale S W |
| Affiliation: | Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France. |
| Abstract: | The branching fractions of the exclusive decays B0-->K(*0)gamma and B+-->K(*+)gamma are measured from a sample of (22.74+/-0.36)x10(6) BB decays collected with the BABAR detector at the PEP-II asymmetric e(+)e(-) collider. We find B (B0-->K(*0)gamma) = [4.23+/-0.40(stat)+/-0.22(syst)]x10(-5), B(B+-->K(*+)gamma) = [3.83+/-0.62(stat)+/-0.22(syst)]x10(-5) and constrain the CP-violating charge asymmetry to be -0.170 |
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