Spectator scattering at NLO in non-leptonic B decays: Leading penguin amplitudes

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dc.creatorBeneke, Martin
dc.creatorJager, Sebastian
dc.date2006-10-24
dc.date2007-02-06
dc.date.accessioned2026-07-07T11:05:59Z
dc.date.available2026-07-07T11:05:59Z
dc.descriptionWe complete the computation of the 1-loop (alpha_s^2) corrections to hard spectator scattering in non-leptonic B decays at leading power in Lambda/m_b by evaluating the penguin amplitudes. This extends the knowledge of these next-to-next-to-leading-order contributions in the QCD factorization formula for B decays to a much wider class of final states, including all pseudoscalar-pseudoscalar, pseudoscalar-vector, and longitudinally polarized vector-vector final states, except final states with eta or eta' mesons. The new 1-loop correction is significant for the colour-suppressed amplitudes, but turns out to be strongly suppressed for the leading QCD penguin amplitude alpha_4^p. We provide numerical values of the phenomenological P/T and C/T amplitude ratios for the pi pi, pi rho and rho rho final states, and discuss corrections to several relations between electroweak penguin and tree amplitudes.
dc.description38 pages, 9 figures, LaTeX. Figure 6 corrected and discussion in section 5.1 adjusted, some minor additional changes. One reference added. Matches the version published in NPB
dc.identifierhttps://arxiv.org/abs/hep-ph/0610322
dc.identifierhttp://arxiv.org/abs/hep-ph/0610322
dc.identifierNucl.Phys.B768:51-84,2007
dc.identifierdoi:10.1016/j.nuclphysb.2007.01.016
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189379
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSpectator scattering at NLO in non-leptonic B decays: Leading penguin amplitudes
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