Three-Parton Contributions to B --> M_1 M_2 Annihilation at Leading Order

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dc.creatorArnesen, Christian M.
dc.creatorRothstein, Ira Z.
dc.creatorStewart, Iain W.
dc.date2006-11-28
dc.date2007-09-23
dc.date.accessioned2026-07-07T11:22:14Z
dc.date.available2026-07-07T11:22:14Z
dc.descriptionWe compute annihilation amplitudes for charmless B decays that are proportional to the three-parton twist-3 light meson distribution amplitude phi_{3M}(x1,x2) with an active gluon. Due to an enhancement from a quark propagator at the scale p^2 ~ mbΛ_QCD these terms occur at the same parametric order in alpha_s(mb) and 1/mb as the known leading order annihilation involving fB and twist-2 meson distributions. With our calculation the leading order annihilation amplitude is now complete. At lowest order in alpha_s the amplitudes are real and only O_{5-8} contribute. Using simple models we find that the three-parton and two-parton terms are of comparable size.
dc.description13 pages, 2 figures. Sign convention modified for consistency with hep-ph/0401188
dc.identifierhttps://arxiv.org/abs/hep-ph/0611356
dc.identifierhttp://arxiv.org/abs/hep-ph/0611356
dc.identifierPhys.Lett.B647:405-412,2007; Erratum-ibid.B653:450,2007
dc.identifierdoi:10.1016/j.physletb.2007.02.041 10.1016/j.physletb.2007.07.052
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194499
dc.subjectHigh Energy Physics - Phenomenology
dc.titleThree-Parton Contributions to B --> M_1 M_2 Annihilation at Leading Order
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