Resummed Mass Distribution for Jets Initiated by Massive Quarks

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dc.creatorAglietti, Ugo
dc.creatorDi Giustino, Leonardo
dc.creatorFerrera, Giancarlo
dc.creatorTrentadue, Luca
dc.date2006-12-06
dc.date2007-07-13
dc.date.accessioned2026-07-07T11:02:19Z
dc.date.available2026-07-07T11:02:19Z
dc.descriptionWe resum the invariant mass distribution of jets initiated by massive quarks in next-to-leading logarithmic approximation and beyond in heuristic way. We find that the inclusion of mass terms, in the N-moment space, results in the universal factor delta_N(Q^2;m^2), taking into account dead-cone effects and soft radiation characteristic of massive charges. This factor multiplies the massless jet distribution function J_N(Q^2). The variable N is rescaled by the mass correction parameter r = m^2/Q^2 << 1 with respect to the standard massless case, being m the quark mass and Q the hard scale. The functions A(alpha_S) and B(alpha_S), appear with a minus sign suppressing collinear effects at large N, as expected. In the same region, soft radiation not collinearly enhanced, characteristic of massive charges, makes its appearance with the function D(alpha_S). Phenomenological applications, such as the resummation of b --> c l nu decay spectra or the inclusion of beauty mass effects in t --> b W decays, are briefly sketched.
dc.description28 pages, stylistic changes, version accepted by journal
dc.identifierhttps://arxiv.org/abs/hep-ph/0612073
dc.identifierhttp://arxiv.org/abs/hep-ph/0612073
dc.identifierPhys.Lett.B651:275-292,2007
dc.identifierdoi:10.1016/j.physletb.2007.06.034
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/188215
dc.subjectHigh Energy Physics - Phenomenology
dc.titleResummed Mass Distribution for Jets Initiated by Massive Quarks
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