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Phys Rev Lett. 2004 Nov 12;93(20):201801. doi: 10.1103/PhysRevLett.93.201801. Epub 2004 Nov 08.

Measurement of time-dependent CP-violating asymmetries in B0-->K*0gamma(K*0-->K(0)Spi0) decays.

Physical review letters

B Aubert, R Barate, D Boutigny, F Couderc, J-M Gaillard, A Hicheur, Y Karyotakis, J P Lees, V Tisserand, A Zghiche, A Palano, A Pompili, J C Chen, N D Qi, G Rong, P Wang, Y S Zhu, G Eigen, I Ofte, B Stugu, G S Abrams, A W Borgland, A B Breon, D N Brown, J 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 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, V G Shelkov, 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, H Koch, B Lewandowski, M Pelizaeus, M Steinke, J T Boyd, N Chevalier, W N Cottingham, M P Kelly, T E Latham, F F Wilson, T Cuhadar-Donszelmann, C Hearty, N S Knecht, T S Mattison, J A McKenna, D Thiessen, A Khan, P Kyberd, L Teodorescu, A E Blinov, V E Blinov, V P Druzhinin, V B Golubev, V N Ivanchenko, E A Kravchenko, A P Onuchin, S I Serednyakov, Yu I Skovpen, E P Solodov, 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Affiliations

  1. Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France.

PMID: 15600911 DOI: 10.1103/PhysRevLett.93.201801

Abstract

We present a measurement of the time-dependent CP-violating asymmetries in B0-->K(*0)gamma(K(*0)-->K(0)(S)pi(0)) decays based on 124 x 10(6) Upsilon(4S)-->BB decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. In a sample containing 105+/-14 signal decays, we measure S(K(*)gamma)=0.25+/-0.63+/-0.14 and C(K(*)gamma)=-0.57+/-0.32+/-0.09, where the first error is statistical and the second, systematic.

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