Nonfactorizable soft contributions in the $B⟶{\eta }_{c}K,{\chi }_{c0}K$ decays with the light-cone sum rules approach

Abstract

In this article, we calculate the nonfactorizable soft contributions in the $B\to {\eta }_{c}K,{\chi }_{c0}K$ decays with the light cone QCD sum rules approach. Our results show that the nonfactorizable corrections from the soft gluon exchanges in the decay $B\to {\eta }_{c}K$ are of $(15-30)$ and should not be neglected. As for the decay $B\to {\chi }_{c0}K$, the factorizable contributions are zero and the nonfactorizable contributions from the soft hadronic matrix elements are too small to accommodate the experimental data.

Comments: 16 pages; Revised version