28,283 research outputs found
Problems of QCD factorization in exclusive decays of B meson to charmonium
We study the exclusive decays of meson into P-wave charmonium states
in the QCD factorization approach with light-cone
distribution functions describing the mesons in the processes. For decay, we find that there are logarithmic divergences arising from
nonfactorizable spectator interactions even at twist-2 order and the decay rate
is too small to accommodate the experimental data. For
decay, we find that aside from the logarithmic divergences arising from
spectator interactions at leading-twist order, more importantly, the
factorization will break down due to the infrared divergence arising from
nonfactorizable vertex corrections, which is independent of the specific form
of the light-cone distribution functions. Our results may indicate that QCD
factorization in the present form may not be safely applied to -meson
exclusive decays to charmonium states.Comment: Latex, 7 pages, 1 eps figure, final version to appear in Phys.Lett.B;
a few references are added, the expression of chi_c1 decay constant is give
- β¦