Estimates of B-decays into K-resonances and dileptons |
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Authors: | Mohammad R Ahmady Dongsheng Liu Amir H Fariborz |
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Institution: | 1. Department of Physics, Ochanomizu University, 1-1, Otsuka 2, Bunkyo-ku, 112, Tokyo, Japan 2. Department of Physics, University of Tasmania, 7001, Hobart, Australia 3. Department of Applied Mathematics, The University of Western Ontario, N6A 5B7, London, Ontario, Canada
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Abstract: | Short and long distance contributions to the exclusive B-decays into various K-resonances and dileptons, i.e. $B \to K^i \ell \bar \ell (\ell = e,\mu ,\nu )$ , are examined. The heavy quark effective theory has been used to calculate the hadronic matrix elements. Substantial branching fractions are obtained for the dileptonic B-decays into some higher excited states of K-mesons. The long distance (resonance) contributions to these exclusive rare B-decay modes dominate the short distance contributions mostly by two orders of magnitude. It is pointed out that, excluding the resonance contributions, the P-wave channels are dominant, accounting for about 50% of the inclusiveB??X s ? + ? ? branching fraction. |
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