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 ℓ + ℓ − branching fraction.
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Ahmady, M.R., Liu, D. & Fariborz, A.H. Estimates of B-decays into K-resonances and dileptons. Z. Phys. C - Particles and Fields 71, 301–305 (1996). https://doi.org/10.1007/BF02906987
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DOI: https://doi.org/10.1007/BF02906987