TY - JOUR
T1 - B → χc J K decays revisited
AU - Beneke, M.
AU - Vernazza, L.
N1 - Funding Information:
This work is supported in part by the DFG Sonderforschungsbereich/Transregio 9 “Computergestützte Theoretische Teilchenphysik” and the Swiss National Science Foundation (SNF). M.B. acknowledges hospitality from the University of Zürich and the CERN theory group, where part of this work was performed.
PY - 2009/4/11
Y1 - 2009/4/11
N2 - 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 χc 2 and hc final states - are reproduced though the suppression of χc 2 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.
AB - 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 χc 2 and hc final states - are reproduced though the suppression of χc 2 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.
UR - http://www.scopus.com/inward/record.url?scp=58149483500&partnerID=8YFLogxK
U2 - 10.1016/j.nuclphysb.2008.11.025
DO - 10.1016/j.nuclphysb.2008.11.025
M3 - Article
AN - SCOPUS:58149483500
SN - 0550-3213
VL - 811
SP - 155
EP - 181
JO - Nuclear Physics, Section B
JF - Nuclear Physics, Section B
IS - 1-2
ER -