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

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dc.creatorBobeth, C.
dc.creatorGrinstein, B.
dc.creatorSavrov, M.
dc.date2007-12-12
dc.date2008-04-29
dc.date.accessioned2026-07-07T11:13:42Z
dc.date.available2026-07-07T11:13:42Z
dc.descriptionWe 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/ψ+h in the effective theory framework is evaluated.
dc.description29 pages, 13 figures; v2: added preprint numbers, acknowledgements; v3: minor corrections and references added to match the journal version
dc.identifierhttps://arxiv.org/abs/0712.1953
dc.identifierhttp://arxiv.org/abs/0712.1953
dc.identifierPhys.Rev.D77:074007,2008
dc.identifierdoi:10.1103/PhysRevD.77.074007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191810
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDecay b -> (c\bar{c}) s in the leading logarithm approximation
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