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B_c Decays and Lifetime in QCD Sum Rules

V. V. Kiselev·A. E. Kovalsky·A. K. Likhoded
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Abstract

In the framework of three-point QCD sum rules, the form factors for the semileptonic decays of B_c --> B_s(B_s^*) l νare calculated with account for the Coulomb-like alpha_s/v-corrections in the heavy quarkonium. The generalized relations due to the spin symmetry of HQET/NRQCD for the form factors are derived at the recoil momentum close to zero. The nonleptonic decays are studied using the assumption on the factorization. The B_c meson lifetime is estimated by summing up the dominating exclusive modes in the c --> s transition combining the current calculations with the previous analysis of b --> c decays in the sum rules of QCD and NRQCD.

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V. V. Kiselev, A. E. Kovalsky, A. K. Likhoded. 2000-05-13. B_c Decays and Lifetime in QCD Sum Rules. https://doi.org/10.1016/s0550-3213(00)00386-2

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