Minimal Subtraction vs. Physical Factorisation Schemes in Small-x QCD

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dc.creatorCiafaloni, M.
dc.creatorColferai, D.
dc.creatorSalam, G. P.
dc.creatorStasto, A. M.
dc.date2006-01-25
dc.date.accessioned2026-07-07T10:44:40Z
dc.date.available2026-07-07T10:44:40Z
dc.descriptionWe investigate the relationship of ``physical'' parton densities defined by kt-factorisation, to those in the minimal subtraction scheme, by comparing their small-x behaviour. We first summarize recent results on the above scheme change derived from the BFKL equation at NLx level, and we then propose a simple extension to the renormalisation-group improved (RGI) equation. In this way we are able the examine the difference between resummed gluon distributions in the Q_0 and MSbar schemes and also to show MSbar scheme resummed results for P_gg and approximate ones for P_qg. We find that, due to the stability of the RGI approach, small-x resummation effects are not much affected by the scheme-change in the gluon channel, while they are relatively more sensitive for the quark-gluon mixing.
dc.description14 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0601200
dc.identifierhttp://arxiv.org/abs/hep-ph/0601200
dc.identifierPhys.Lett.B635:320-329,2006
dc.identifierdoi:10.1016/j.physletb.2006.03.014
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182677
dc.subjectHigh Energy Physics - Phenomenology
dc.titleMinimal Subtraction vs. Physical Factorisation Schemes in Small-x QCD
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