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Measurement of the CP asymmetry in b-->sgamma using a sum of exclusive final states |
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| Authors: | Aubert B Bona M Karyotakis Y Lees J P Poireau V Prudent X Tisserand V Zghiche A Tico J Garra Grauges E Lopez L Palano A Pappagallo M Eigen G Stugu B Sun L Abrams G S Battaglia M Brown D N Button-Shafer J Cahn R N Jacobsen R G Kadyk J A Kerth L T Kolomensky Yu G Kukartsev G Lynch G Osipenkov I L Ronan M T Tackmann K Tanabe T Wenzel W A Hawkes C M Soni N Watson A T Koch H Schroeder T Walker D Asgeirsson D J Cuhadar-Donszelmann T Fulsom B G Hearty C Mattison T S McKenna J A Barrett M Khan A Saleem M Teodorescu L Blinov V E Bukin A D Buzykaev A R Druzhinin V P Golubev V B Onuchin A P |
| Institution: | Laboratoire de Physique des Particules, IN2P3-CNRS et Université de Savoie, Annecy-Le-Vieux, France. |
| Abstract: | We perform a measurement of the CP asymmetry in b-->sgamma decays using a sample of 383 x 10(6) Bover] B 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 X_(s) 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/c(2). |
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