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Search for the radiative decays B-->rhogamma and B0-->omegagamma |
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| Authors: | Aubert B Barate R Boutigny D Gaillard J-M Hicheur A Karyotakis Y Lees J P Robbe P Tisserand V Zghiche A Palano A Pompili A Chen J C Qi N D Rong G Wang P Zhu Y S Eigen G Ofte I Stugu B Abrams G S Borgland A W Breon A B Brown D N Button-Shafer J Cahn R N Charles E Day C T Gill M S Gritsan A V Groysman Y Jacobsen R G Kadel R W Kadyk J Kerth L T Kolomensky Yu G Kral J F Kukartsev G LeClerc C Levi M E Lynch G Mir L M Oddone P J Orimoto T J Pripstein M Roe N A Romosan A Ronan M T Shelkov V G Telnov A V Wenzel W A Harrison T J Hawkes C M Knowles D J Penny R C Watson A T Watson N K Deppermann T |
| Affiliation: | Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France. |
| Abstract: | A search of the exclusive radiative decays B-->rho(770)gamma and B0-->omega(782)gamma is performed on a sample of about 84x10(6) BBmacr; events collected by the BABAR detector at the SLAC PEP-II asymmetric-energy e+e- storage ring. No significant signal is seen in any of the channels. We set upper limits on the branching fractions B of B(B0-->rho(0)gamma)<1.2 x 10(-6), B(B+-->rho+gamma)<2.1 x 10(-6), and B(B0-->omegagamma)<1.0 x 10(-6) at 90% confidence level (C.L.). Using the assumption that Gamma(B-->rhogamma)=Gamma(B+-->rho(+)gamma)=2 x Gamma(B0-->rho(0)gamma), we find the combined limit B(B-->rhogamma)<1.9 x 10(-6), corresponding to B(B-->rhogamma)/B(B-->K*gamma)<0.047 at 90% C.L. |
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