Next-to-Next-to-Leading Order Evolution of Non-Singlet Fragmentation Functions

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dc.creatorMitov, A.
dc.creatorMoch, S.
dc.creatorVogt, A.
dc.date2006-04-06
dc.date.accessioned2026-07-07T10:44:59Z
dc.date.available2026-07-07T10:44:59Z
dc.descriptionWe have investigated the next-to-next-to-leading order (NNLO) corrections to inclusive hadron production in e^+e^- annihilation and the related parton fragmentation distributions, the `time-like' counterparts of the `space-like' deep-inelastic structure functions and parton densities. We have re-derived the corresponding second-order coefficient functions in massless perturbative QCD, which so far had been calculated only by one group. Moreover we present, for the first time, the third-order splitting functions governing the NNLO evolution of flavour non-singlet fragmentation distributions. These results have been obtained by two independent methods relating time-like quantities to calculations performed in deep-inelastic scattering. We briefly illustrate the numerical size of the NNLO corrections, and make a prediction for the difference of the yet unknown time-like and space-like splitting functions at the fourth order in the strong coupling constant.
dc.description10 pages, LaTeX, 2 eps-figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0604053
dc.identifierhttp://arxiv.org/abs/hep-ph/0604053
dc.identifierPhys.Lett.B638:61-67,2006
dc.identifierdoi:10.1016/j.physletb.2006.05.005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182786
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNext-to-Next-to-Leading Order Evolution of Non-Singlet Fragmentation Functions
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