Can we trust small x resummation?

We review the current status of small x resummation of evolution of parton distributions and of deep-inelastic coefficient functions. We show that the resummed perturbative expansion is stable, robust upon different treatments of subleading terms, and that it matches smoothly to the unresummed pertu...

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Detalles Bibliográficos
Autores principales: Forte, Stefano, Altarelli, Guido, Ball, Richard D.
Lenguaje:eng
Publicado: 2009
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysbps.2009.03.114
http://cds.cern.ch/record/1155134
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author Forte, Stefano
Altarelli, Guido
Ball, Richard D.
author_facet Forte, Stefano
Altarelli, Guido
Ball, Richard D.
author_sort Forte, Stefano
collection CERN
description We review the current status of small x resummation of evolution of parton distributions and of deep-inelastic coefficient functions. We show that the resummed perturbative expansion is stable, robust upon different treatments of subleading terms, and that it matches smoothly to the unresummed perturbative expansions, with corrections which are of the same order as the typical NNLO ones in the HERA kinematic region. We discuss different approaches to small x resummation: we show that the ambiguities in the resummation procedure are small, provided all parametrically enhanced terms are included in the resummation and properly matched.
id cern-1155134
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2009
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spelling cern-11551342022-08-13T18:32:03Zdoi:10.1016/j.nuclphysbps.2009.03.114http://cds.cern.ch/record/1155134engForte, StefanoAltarelli, GuidoBall, Richard D.Can we trust small x resummation?Particle Physics - PhenomenologyWe review the current status of small x resummation of evolution of parton distributions and of deep-inelastic coefficient functions. We show that the resummed perturbative expansion is stable, robust upon different treatments of subleading terms, and that it matches smoothly to the unresummed perturbative expansions, with corrections which are of the same order as the typical NNLO ones in the HERA kinematic region. We discuss different approaches to small x resummation: we show that the ambiguities in the resummation procedure are small, provided all parametrically enhanced terms are included in the resummation and properly matched.We review the current status of small x resummation of evolution of parton distributions and of deep-inelastic coefficient functions. We show that the resummed perturbative expansion is stable, robust upon different treatments of subleading terms, and that it matches smoothly to the unresummed perturbative expansions, with corrections which are of the same order as the typical NNLO ones in the HERA kinematic region. We discuss different approaches to small x resummation: we show that the ambiguities in the resummation procedure are small, provided all parametrically enhanced terms are included in the resummation and properly matched.arXiv:0901.1294IFUM-935-FTIFUM-935-FToai:cds.cern.ch:11551342009-01-12
spellingShingle Particle Physics - Phenomenology
Forte, Stefano
Altarelli, Guido
Ball, Richard D.
Can we trust small x resummation?
title Can we trust small x resummation?
title_full Can we trust small x resummation?
title_fullStr Can we trust small x resummation?
title_full_unstemmed Can we trust small x resummation?
title_short Can we trust small x resummation?
title_sort can we trust small x resummation?
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.nuclphysbps.2009.03.114
http://cds.cern.ch/record/1155134
work_keys_str_mv AT fortestefano canwetrustsmallxresummation
AT altarelliguido canwetrustsmallxresummation
AT ballrichardd canwetrustsmallxresummation

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