Measurement of branching fractions and mass spectra of B→Kππ γ

Bernard Aubert, R. Barate, D. Boutigny, F. Couderc,Y. Karyotakis, J. P. Lees,V. Poireau, V. Tisserand, A. Zghiche,E. Grauges, A. Palano,M. Pappagallo,Alexis Pompili,J. C. Chen, N. D. Qi, G. Rong, Pu Wang,Y. S. Zhu,G. Eigen, I. Ofte, B. Stugu,G. S. Abrams, M. Battaglia, A. B. Breon,D. N. Brown,Janice Button-Shafer,R. N. Cahn,E. Charles, C. T. Day,M. S. Gill,A. V. Gritsan, Y. Groysman,R. G. Jacobsen,R. W. Kadel,J. A. Kadyk,L. T. Kerth,Yu. G. Kolomensky, G. Kukartsev, G. Lynch,L. M. Mir,P. J. Oddone,T. J. Orimoto, M. Pripstein,N. A. Roe,M. T. Ronan,W. A. Wenzel, M. Barrett,K. E. Ford,T. J. Harrison,A. J. Hart,C. M. Hawkes,S. E. Morgan,A. T. Watson, M. Fritsch, K. Goetzen,T. Held,Herbert Koch, B. Lewandowski, M. Pelizaeus,K. Peters, T. Schroeder, M. Steinke,J. T. Boyd,J. P. Burke, N. Chevalier,W. N. Cottingham,M. P. Kelly, T. Cuhadar-Donszelmann, B. G. Fulsom,C. Hearty,N. S. Knecht,T. S. Mattison,J. A. McKenna,Akram Khan,Paul Kyberd,M. Saleem,Liliana Teodorescu,A. E. Blinov,V. E. Blinov,A. D. Bukin,V. P. Druzhinin,V. B. Golubev,E. A. Kravchenko,A. P. Onuchin,S. I. Serednyakov,Yu I. Skovpen,E. P. Solodov,A. N. Yushkov, D. S. Best, M. Bondioli, M. Bruinsma, M. Chao, I. Eschrich, D. Kirkby,A. J. Lankford,M. Mandelkern, R. K. Mommsen, W. Roethel,D. P. Stoker, C. D. Buchanan

Physical Review Letters（2007）

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摘要

We present a measurement of the partial branching fractions and mass spectra of the exclusive radiative penguin processes B -> K pi pi gamma in the range m_Kpipi pi+ pi-. Using 232 million e+ e- -> B Bbar events recorded by the BaBar experiment at the PEP-II asymmetric-energy storage ring, we measure the branching fractions BR(B+ -> K+ pi- pi+ gamma) = (2.95 +- 0.13 (stat.) +- 0.20 (syst.)) x 10^-5, BR(B0 -> K+ pi- pi0 gamma) = (4.07 +- 0.22 (stat.) +- 0.31 (syst.)) x 10^-5, BR(B0 -> K0 pi+ pi- gamma) = (1.85 +- 0.21 (stat.) +- 0.12 (syst.)) x 10^-5, and BR(B+ -> K0 pi+ pi0 gamma) = (4.56 +- 0.42 (stat.) +- 0.31 (syst.)) x 10^-5.

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