B -> chi_cJ K decays revisited
High Energy Physics - Phenomenology
2009-03-04 v1
Abstract
We demonstrate that exclusive B decays to P-wave charmonium factorize in the non-relativistic limit provided that colour-octet contributions are taken into account, and estimate the branching fractions. Although there are very large uncertainties, we find reasonable parameter choices, where the main features of the data -- large corrections to (naive) factorization and suppression of the chi_{c2} and h_c final states -- are reproduced though the suppression of chi_{c2} is not as strong as seen in the data. Our results also provide an example, where an endpoint divergence in hard spectator-scattering factorizes and is absorbed into colour-octet operator matrix elements.
Cite
@article{arxiv.0810.3575,
title = {B -> chi_cJ K decays revisited},
author = {M. Beneke and L. Vernazza},
journal= {arXiv preprint arXiv:0810.3575},
year = {2009}
}
Comments
32 pages, LaTeX