Measurement Of Branching Fractions And Mass Spectra Of B -> K Pi Pi Gamma

B. Aubert,R. Barate,D. Boutigny,F. Couderc,Y. Karyotakis,J. P. Lees,V. Poireau,V. Tisserand,A. Zghiche,E. Grauges,A. Palano,M. Pappagallo,A. Pompili,J. C. Chen,N. D. Qi,G. Rong,P. Wang,K. E. Ford,T. J. Harrison,A. J. Hart,C. M. Hawkes,S. E. Morgan,A. T. Watson,M. Fritsch,K. Goetzen,T. Held,H. Koch,B. Lewandowski,M. Pelizaeus,K. Peters,T. Schroeder,M. Steinke,J. T. Boyd,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,A. Khan,P. Kyberd,M. Saleem,L. 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,I. Skovpen,E. P. Solodov,A. N. Yushkov,M. Bondioli,M. Bruinsma,M. Chao, I. Eschrich,D. Kirkby,A. J. Lankford,M. Mandelkern,R. K. Mommsen, W. Roethel,D. P. Stoker,C. Buchanan,B. L. Hartel,S. D. Foulkes,J. W. Gary,B. C. Shen,K. Wang,L. Zhang,H. K. Hadavand,E. J. Hill,D. B. MacFarlane,H. P. Paar,S. Rahatlou,V. Sharma,J. W. Berryhill,C. 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Eckhart,A. Soffer,W. H. Toki,R. J. Wilson,Q. Zeng,D. Altenburg,E. Feltresi,A. Hauke, B. Spaan,T. Brandt,J. Brose,M. Dickopp,V. Klose,H. M. Lacker,R. Nogowski,S. Otto,A. Petzold,G. Schott,J. Schubert,K. R. Schubert, R. Schwierz,J. E. Sundermann,D. Bernard,G. R. Bonneaud,P. Grenier,S. Schrenk,Ch. Thiebaux,G. Vasileiadis,M. Verderi,D. J. Bard,P. J. Clark,W. Gradl,F. Muheim,S. Playfer,Y. Xie,M. Andreotti,V. Azzolini,D. Bettoni,C. Bozzi,R. Calabrese,G. Cibinetto,E. Luppi,M. Negrini,L. Piemontese,F. Anulli,R. Baldini-Ferroli,A. Calcaterra,R. de Sangro,G. Finocchiaro,P. Patteri,I. M. Peruzzi,M. Piccolo,A. Zallo,A. Buzzo,R. Capra,R. Contri,M. Lo Vetere,M. Macri,M. R. Monge,S. Passaggio, C. Patrignani,E. Robutti,A. Santroni,S. Tosi,S. Bailey,G. Brandenburg,K. S. Chaisanguanthum,M. Morii,E. Won,J. Wu,R. S. Dubitzky,U. Langenegger,J. Marks,S. Schenk,U. Uwer,W. Bhimji,D. A. Bowerman,P. D. Dauncey,U. Egede,R. L. Flack,J. R. Gaillard,G. W. Morton,J. A. Nash,M. B. Nikolich,G. P. Taylor,W. P. 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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(K pi pi)< 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 232x10(6) e(+)e(-)-> B (B) over bar 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)]x10(-5), B(B-0 -> K+pi(-)pi(0)gamma)=[4.07 +/- 0.22(stat)+/- 0.31(syst)]x10(-5), B(B-0 -> K-0 pi(+)pi(-)gamma)=[1.85 +/- 0.21(stat)+/- 0.12(syst)]x10(-5), and B(B+-> K-0 pi(+)pi(0)gamma)=[4.56 +/- 0.42(stat)+/- 0.31(syst)]x10(-5).

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关键词

mass spectra,electron beam,energy storage,elementary particles

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