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Measurement of branching fractions and mass spectra of B-->Kpipigamma |
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| Authors: | Aubert B Barate R Boutigny D Couderc F Karyotakis Y Lees J P Poireau V Tisserand V Zghiche A Grauges E Palano A Pappagallo M Pompili A Chen J C Qi N D Rong G Wang P Zhu Y S Eigen G Ofte I Stugu B Abrams G S Battaglia M 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 Kukartsev G Lynch G Mir L M Oddone P J Orimoto T J Pripstein M Roe N A Ronan M T Wenzel W A Barrett M Ford K E Harrison T J Hart A J Hawkes C M Morgan S E Watson A T Fritsch M Goetzen K Held T Koch H Lewandowski B Pelizaeus M |
| Institution: | Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France. |
| Abstract: | We present a measurement of the partial branching fractions and mass spectra of the exclusive radiative penguin processes B-->Kpipigamma in the range m(Kpipi)<1.8 GeV/c(2). We reconstruct four final states: K(+)pi(-)pi(+)gamma, K(+)pi(-)pi(0)gamma, K(S)(0)pi(-)pi(+)gamma, and K(S)(0)pi(+)pi(0)gamma, where K(S)(0)-->pi(+)pi(-). Using 232 x 10(6) e(+)e(-)-->BB events recorded by the BABAR experiment at the SLAC PEP-II asymmetric-energy storage ring, we measure the branching fractions B(B(+)-->K(+)pi(-)pi(+)gamma)=2.95+/-0.13(stat)+/-0.20(syst)] x 10(-5), B(B(0)-->K(+)pi(-)pi(0)gamma)=4.07+/-0.22(stat)+/-0.31(syst)] x 10(-5), B(B(0)-->K(0)pi(+)pi(-)gamma)=1.85+/-0.21(stat)+/-0.12(syst)] x 10(-5), and B(B(+)-->K(0)pi(+)pi(0)gamma)=4.56+/-0.42(stat)+/-0.31(syst)] x 10(-5). |
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