Semileptonic $B(B_s, B_c)$ decays in the light-cone QCD sum rules

Details Semileptonic $B(B_s, B_c)$ decays in the light-cone QCD sum rules Semileptonic $B(B_s, B_c)$ decays in the light-cone QCD sum rules

2008-01-03

arxiv.org/abs/0801.0473v2

Int.J.Mod.Phys.A23:3237-3245,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, talk given by the first arthur at 4th International Conference on Flavor Physics (ICFP 2007), Beijing, China, Sept 24

Scientific paper

10.1142/S0217751X0804189X

Semileptonic $B$($B_s, B_c$) decays are investigated systematically in the light-cone QCD sum rules. Special emphasis is put on the LCSR calculation on weak form factors with an adequate chiral current correlator, which turns out to be particularly effective to control the pollution by higher twist components of spectator mesons. The result for each channel depends on the distribution amplitude of the the producing meson. The leading twist distribution amplitudes of the related heavy mesons and charmonium are worked out by a model approach in the reasonable way. A practical scenario is suggested to understand the behavior of weak form factors in the whole kinematically accessible ranges. The decay widths and branching ratios are estimated for several $B$($B_c$) decay modes of current interest.

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