Centrality Dependence of the Charged Particle Multiplicity near Mid-Rapidity in Au+Au Collisions at sqrt(s_NN) = 130 and 200 GeV

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dc.creatorBack, B. B.
dc.creatorCollaboration, PHOBOS
dc.date2002-01-11
dc.date2002-01-12
dc.date.accessioned2026-07-07T10:34:31Z
dc.date.available2026-07-07T10:34:31Z
dc.descriptionThe PHOBOS experiment has measured the charged particle multiplicity at mid-rapidity in Au+Au collisions at sqrt(s_NN) = 200 GeV as a function of the collision centrality. Results on dN/deta(eta<1) divided by the number of participating nucleon pairs, <Npart/2>, are presented as a function of <Npart>. As was found from similar data at sqrt(s_NN) = 130 GeV, the data can be equally well described by parton saturation models and two-component fits which include contributions that scale as Npart and the number of binary collisions, Ncoll. We compare the data at the two energies by means of the ratio R(200/130) of the charged particle multiplicity for the two different energies as a function of <Npart>. For events with <Npart>>100$, we find that this ratio is consistent with a constant value of 1.14+-0.01(stat.)+-0.05(syst.).
dc.description5 pages, 2 figures, submitted to Phys. Rev. C - Rapid Communications
dc.identifierhttps://arxiv.org/abs/nucl-ex/0201005
dc.identifierhttp://arxiv.org/abs/nucl-ex/0201005
dc.identifierPhys.Rev.C65:061901,2002
dc.identifierdoi:10.1103/PhysRevC.65.061901
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/179499
dc.subjectNuclear Experiment
dc.titleCentrality Dependence of the Charged Particle Multiplicity near Mid-Rapidity in Au+Au Collisions at sqrt(s_NN) = 130 and 200 GeV
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