Saturation and parton level Cronin effect: enhancement vs suppression of gluon production in p-A and A-A collisions

We note that the phenomenon of perturbative saturation leads to transverse momentum broadening in the spectrum of partons produced in hadronic collisions. This broadening has a simple interpretation as parton level Cronin effect. The effect appears for systems in which saturation is generated by the...

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Detalles Bibliográficos
Autores principales: Baier, Rudolf, Kovner, Alexander, Wiedemann, Urs Achim
Lenguaje:eng
Publicado: 2003
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.68.054009
http://cds.cern.ch/record/618164
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author Baier, Rudolf
Kovner, Alexander
Wiedemann, Urs Achim
author_facet Baier, Rudolf
Kovner, Alexander
Wiedemann, Urs Achim
author_sort Baier, Rudolf
collection CERN
description We note that the phenomenon of perturbative saturation leads to transverse momentum broadening in the spectrum of partons produced in hadronic collisions. This broadening has a simple interpretation as parton level Cronin effect. The effect appears for systems in which saturation is generated by the "tree level" Glauber-Mueller mechanism as well as for those where it results form the nonlinear QCD evolution to high energy. We discuss the relation of this phenomenon to the recent analysis by Kharzeev-Levin-McLerran of the momentum and centrality dependence of particle production in nucleus-nucleus collisions at RHIC.
id cern-618164
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
record_format invenio
spelling cern-6181642023-03-12T05:58:36Zdoi:10.1103/PhysRevD.68.054009http://cds.cern.ch/record/618164engBaier, RudolfKovner, AlexanderWiedemann, Urs AchimSaturation and parton level Cronin effect: enhancement vs suppression of gluon production in p-A and A-A collisionsParticle Physics - PhenomenologyWe note that the phenomenon of perturbative saturation leads to transverse momentum broadening in the spectrum of partons produced in hadronic collisions. This broadening has a simple interpretation as parton level Cronin effect. The effect appears for systems in which saturation is generated by the "tree level" Glauber-Mueller mechanism as well as for those where it results form the nonlinear QCD evolution to high energy. We discuss the relation of this phenomenon to the recent analysis by Kharzeev-Levin-McLerran of the momentum and centrality dependence of particle production in nucleus-nucleus collisions at RHIC.We note that the phenomenon of perturbative saturation leads to transverse momentum broadening in the spectrum of partons produced in hadronic collisions. This broadening has a simple interpretation as parton level Cronin effect for systems in which saturation is generated by the tree level Glauber-Mueller mechanism. For systems where the broadening results form the nonlinear QCD evolution to high energy, the presence or absence of Cronin effect depends crucially on the quantitative behavior of the gluon distribution functions at transverse momenta kt outside the so called scaling window. We discuss the relation of this phenomenon to the recent analysis by Kharzeev-Levin-McLerran of the momentum and centrality dependence of particle production in nucleus-nucleus collisions at RHIC.hep-ph/0305265BI-TP-2003-12CERN-TH-2003-116BI-TP-2003-12CERN-TH-2003-116oai:cds.cern.ch:6181642003-05-23
spellingShingle Particle Physics - Phenomenology
Baier, Rudolf
Kovner, Alexander
Wiedemann, Urs Achim
Saturation and parton level Cronin effect: enhancement vs suppression of gluon production in p-A and A-A collisions
title Saturation and parton level Cronin effect: enhancement vs suppression of gluon production in p-A and A-A collisions
title_full Saturation and parton level Cronin effect: enhancement vs suppression of gluon production in p-A and A-A collisions
title_fullStr Saturation and parton level Cronin effect: enhancement vs suppression of gluon production in p-A and A-A collisions
title_full_unstemmed Saturation and parton level Cronin effect: enhancement vs suppression of gluon production in p-A and A-A collisions
title_short Saturation and parton level Cronin effect: enhancement vs suppression of gluon production in p-A and A-A collisions
title_sort saturation and parton level cronin effect: enhancement vs suppression of gluon production in p-a and a-a collisions
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.68.054009
http://cds.cern.ch/record/618164
work_keys_str_mv AT baierrudolf saturationandpartonlevelcronineffectenhancementvssuppressionofgluonproductioninpaandaacollisions
AT kovneralexander saturationandpartonlevelcronineffectenhancementvssuppressionofgluonproductioninpaandaacollisions
AT wiedemannursachim saturationandpartonlevelcronineffectenhancementvssuppressionofgluonproductioninpaandaacollisions

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