A search for the decays B-->rho(770)gamma and B-0-->omega(782)gamma is performed on a sample of 211x10(6) Y(4S)-->B (B) over bar events collected by the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)e(-) storage ring. No evidence for the decays is seen. We set the following limits on the individual branching fractions: B(B+-->rho(+)gamma)<1.8x10(-6), B(B-0-->rho(0)gamma)<0.4x10(-6), and B(B-0-->omegagamma)<1.0x10(-6) at the 90% confidence level. We use the quark model to limit the combined branching fraction (B) over bar [B-->(rho/omega)gamma]<1.2x10(-6), from which we determine a constraint on the ratio of Cabibbo-Kobayashi-Maskawa matrix elements |V-td|/|V-ts|.

Search for radiative penguin decays B+->rho(+)gamma, B-0 ->rho(0)gamma, and B-0 ->omega gamma / 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, Y.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. 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Search for radiative penguin decays B+->rho(+)gamma, B-0 ->rho(0)gamma, and B-0 ->omega gamma

A. Lazzaro;V. Lombardo;F. Palombo;N. Neri;
2005

Abstract

A search for the decays B-->rho(770)gamma and B-0-->omega(782)gamma is performed on a sample of 211x10(6) Y(4S)-->B (B) over bar events collected by the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)e(-) storage ring. No evidence for the decays is seen. We set the following limits on the individual branching fractions: B(B+-->rho(+)gamma)<1.8x10(-6), B(B-0-->rho(0)gamma)<0.4x10(-6), and B(B-0-->omegagamma)<1.0x10(-6) at the 90% confidence level. We use the quark model to limit the combined branching fraction (B) over bar [B-->(rho/omega)gamma]<1.2x10(-6), from which we determine a constraint on the ratio of Cabibbo-Kobayashi-Maskawa matrix elements |V-td|/|V-ts|.
B mesons; electromagnetic decays; electroweak theories; Feynman diagrams; meson decay
Settore FIS/01 - Fisica Sperimentale
2005
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/16160
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