B → χ cJ K decays revisited
نویسندگان
چکیده
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 χ c2 and h c final states – are reproduced though the suppression of χ 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.
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تاریخ انتشار 2008