English

Decay b -> (c\bar{c}) s in the leading logarithm approximation

High Energy Physics - Phenomenology 2008-11-26 v3

Abstract

We consider an effective field theory for the nonleptonic decay in which a heavy quark decays into a pair of a heavy quark and antiquark having a small relative velocity and one relativistic (massless) quark. This effective theory is a combination of HQET, SCET, and a covariant modification of NRQCD. In the leading logarithm approximation the effective theory decay amplitude factorizes into the product of matrix elements of heavy-to-heavy and heavy-to-light currents. We discuss a possibility of factorization beyond the leading logarithm approximation and find it doubtful. The Wilson coefficients of the effective theory electro-weak (EWET) Lagrangian in the next-to-the leading logarithm approximation are calculated at the matching scale of the decay. The differential decay rate for the inclusive decay B -> J/\psi+h in the effective theory framework is evaluated.

Keywords

Cite

@article{arxiv.0712.1953,
  title  = {Decay b -> (c\bar{c}) s in the leading logarithm approximation},
  author = {C. Bobeth and B. Grinstein and M. Savrov},
  journal= {arXiv preprint arXiv:0712.1953},
  year   = {2008}
}

Comments

29 pages, 13 figures; v2: added preprint numbers, acknowledgements; v3: minor corrections and references added to match the journal version

R2 v1 2026-06-21T09:53:19.312Z