Small-x single-particle distributions in jets from the coherent branching formalism

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dc.creatorSapeta, Sebastian
dc.creatorWiedemann, Urs Achim
dc.date2008-09-24
dc.date.accessioned2026-07-07T13:13:19Z
dc.date.available2026-07-07T13:13:19Z
dc.descriptionWe calculate single parton distributions inside quark and gluon jets within the coherent branching formalism, which resums leading and next-to-leading logarithmic contributions. This formalism is at the basis of the modified leading logarithmic approximation (MLLA), and it conserves energy exactly. For a wide preasymptotic range of the evolution variable Y=ln[Eθ/Q_0], we find marked differences in the shape and norm of single parton distributions calculated in the MLLA or in the coherent branching formalism, respectively. For asymptotically large values Y>5-10, the difference in norm persists, while differences in shape disappear. In this way, our numerical study delineates the jet energy scale needed for a reliable application of both approaches. We also study the dependence of the single parton distributions on the hadronization scale Q_0 and on Λ_QCD, and we calculate within the coherent branching formalism the identified quark and gluon distributions inside quark and gluon jets.
dc.description23 pages, 12 figures
dc.identifierhttps://arxiv.org/abs/0809.4251
dc.identifierhttp://arxiv.org/abs/0809.4251
dc.identifierJHEP 0905:023,2009
dc.identifierdoi:10.1088/1126-6708/2009/05/023
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229853
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSmall-x single-particle distributions in jets from the coherent branching formalism
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