Decays and Lifetime of B_c in QCD Sum Rules
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 \nu are 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.
Cite
@article{arxiv.hep-ph/0006104,
title = {Decays and Lifetime of B_c in QCD Sum Rules},
author = {V. V. Kiselev and A. E. Kovalsky and A. K. Likhoded},
journal= {arXiv preprint arXiv:hep-ph/0006104},
year = {2007}
}
Comments
7 pages, JHEP class, 5 eps-figures, Talk given at the Vth International Workshop "HEAVY QUARK PHYSICS" April 6-8, 2000, Dubna, Russia