B--> K-chi c0(-) decay from charmed meson rescattering

摘要

We study the process B- --> K- chi(c0) considering intermediate charmed meson rescattering effects. For this decay mode the naive factorization ansatz would predict a vanishing amplitude. We estimate contributions from the D-s(()*()) D-(*()) --> K- chi(c0) rescattering amplitudes, and compare the result with recent experimental measurements. We find that rescattering effects are able to produce a large branching ratio consistent with measurements by Belle Collaboration. We also consider rescattering effects in B- --> K- J/psi, arguing that they play a similar role in producing a large branching fraction for this colour-suppressed decay mode. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 39]