Saturation physics at HERA and RHIC: An unified description

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dc.creatorGoncalves, V. P.
dc.creatorKugeratski, M. S.
dc.creatorMachado, M. V. T.
dc.creatorNavarra, F. S.
dc.date2006-08-04
dc.date2006-11-23
dc.date.accessioned2026-07-07T11:05:25Z
dc.date.available2026-07-07T11:05:25Z
dc.descriptionOne of the frontiers of QCD which are intensely investigated in high energy experiments is the high energy (small $x$) regime, where we expect to observe the non-linear behavior of the theory. In this regime, the growth of the parton distribution should saturate, forming a Color Glass Condensate (CGC). In fact, signals of parton saturation have already been observed both in $ep$ deep inelastic scattering at HERA and in deuteron-gold collisions at RHIC. Currently, the description of the experimental data of these experiments is possible considering different phenomenological saturation models for the two processes within the CGC formalism. In this letter we analyze the universality of these dipole cross section parameterizations and verify that they are not able to describe the HERA and RHIC data simultaneously. We analyze possible improvements in the parameterizations and propose a new parametrization for the forward dipole amplitude which allows us to describe quite well the small-$x$ $ep$ HERA data on $F_2$ structure function as well as the $dAu$ RHIC data on charged hadron spectra. It is an important signature of the universality of the saturation physics.
dc.description12 pages, 4 figures. Version to be published in Physics Letters B
dc.identifierhttps://arxiv.org/abs/hep-ph/0608063
dc.identifierhttp://arxiv.org/abs/hep-ph/0608063
dc.identifierPhys.Lett.B643:273-278,2006
dc.identifierdoi:10.1016/j.physletb.2006.10.068
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189197
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Experiment
dc.subjectNuclear Theory
dc.titleSaturation physics at HERA and RHIC: An unified description
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