B → χc J K decays revisited

M. Beneke; L. Vernazza

doi:10.1016/j.nuclphysb.2008.11.025

B → χ_{c J} K decays revisited

M. Beneke
, L. Vernazza

RWTH Aachen University
University of Zurich

Research output: Contribution to journal › Article › peer-review

48 Scopus citations

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 χ_{c 2} and h_c final states - are reproduced though the suppression of χ_{c 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.

Original language	English
Pages (from-to)	155-181
Number of pages	27
Journal	Nuclear Physics, Section B
Volume	811
Issue number	1-2
DOIs	https://doi.org/10.1016/j.nuclphysb.2008.11.025
State	Published - 11 Apr 2009
Externally published	Yes

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10.1016/j.nuclphysb.2008.11.025

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title = "B → χc J K decays revisited",

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 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.",

author = "M. Beneke and L. Vernazza",

note = "Funding Information: This work is supported in part by the DFG Sonderforschungsbereich/Transregio 9 “Computergest{\"u}tzte Theoretische Teilchenphysik” and the Swiss National Science Foundation (SNF). M.B. acknowledges hospitality from the University of Z{\"u}rich and the CERN theory group, where part of this work was performed.",

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doi = "10.1016/j.nuclphysb.2008.11.025",

language = "English",

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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 - https://www.scopus.com/pages/publications/58149483500

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 -

B → χ_{c J} K decays revisited

Abstract

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