Measurement of theCPAsymmetry inb→sγUsing a Sum of Exclusive Final States

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Porter,V Tisserand,J P Coleman,D J Bard,G Della Ricca,J P Lees,J D Richman,E C Martin,K R Schubert,B Spaan,M Gaspero,S Saremi,A Palano,V E Blinov,G Lynch,F Blanc,E Baracchini,F Ferrarotto,P E Kutter,I M Peruzzi,F Simonetto,I Bingham,P J Clark,R Kroeger,T Schalk,A E Rubin,V Klose,H R Band,S J Gowdy,R Faccini,M Battaglia,M Carpinelli,A P Onuchin,D G Hitlin,M Bondioli,Y Karyotakis,J J Regensburger,R Contri,G Eigen,T Hartmann,N Gagliardi,B C Shen,A D Bukin,H Nicholson,E I Rosenberg,I Eschrich,D Bettoni,G Schott,R S Dubitzky,S Schenk,F Bianchi,S I Serednyakov,R Gamet,D P Stoker,D W G S Leith,C J Flacco,R Bula,J Kroseberg,A T Watson,G Cavoto,N L Blount,A V Telnov,R Cowan,W S Lockman,T S Mattison,S Emery,S Nelson,M A Mazzoni,D A Roberts,R Messner,D J Asgeirsson,S Pruvot,R Godang,D B Macfarlane,J Schubert,W Panduro Vazquez,C Voci,F Liu,K J Knoepfel,Q K Wong,H Kagan,W Kozanecki,P H Fisher,A Kreisel,R J Barlow,S E Mclachlin,A Gaidot,G Raven,H Schröder,J Schwiening,A Lusiani,P Roudeau,S J 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doi:10.1103/physrevlett.101.171804

Abstract

We perform a measurement of the CP asymmetry in b→sγ decays using a sample of 383×106 BB¯ events collected by the BABAR detector at the SLAC PEP-II asymmetric B factory. We reconstruct 16 flavor-specific B decay modes containing a high-energy photon and a hadronic system Xs containing an s quark. We measure the CP asymmetry to be −0.011±0.030(stat)±0.014(syst) for a hadronic system mass between 0.6 and 2.8 GeV/c2.Received 30 May 2008DOI:https://doi.org/10.1103/PhysRevLett.101.171804©2008 American Physical Society

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