Antiparticle to particle ratios and identified hadron spectra in Cu+Cu and Au+Au collisions

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dc.creatorVeres, Gabor I.
dc.date2007-01-26
dc.date.accessioned2026-07-07T10:38:25Z
dc.date.available2026-07-07T10:38:25Z
dc.descriptionNew results on antiparticle to particle ratios in Cu+Cu and Au+Au collisions at sqrt(s_NN) = 62.4 and 200 GeV from the PHOBOS experiment at RHIC are presented. Transverse momentum spectra of pions, kaons, protons and antiprotons from Au+Au collisions at sqrt(s_NN) = 62.4 GeV close to mid-rapidity are also discussed. Antiparticle to particle ratios are found to be remarkably independent of the collision centrality in both colliding systems. The collision energy dependence of the pbar/p ratios is very significant in Cu+Cu collisions. Baryons are found to have substantially harder transverse momentum spectra than mesons. The pT region in which the proton to pion ratio reaches unity in central Au+Au collisions at sqrt(s_NN) = 62.4 GeV fits into a smooth trend as a function of collision energy. The observed particle yields at very low pT are comparable to extrapolations from higher pT for kaons, protons and antiprotons. The net proton yield at mid-rapidity is found to be proportional to the number of participant nucleons in Au+Au collisions at 62.4 and 200 GeV energies.
dc.description5 pages, 3 figures, Presented at the Quark Matter 2006 conference in Shanghai, China
dc.identifierhttps://arxiv.org/abs/nucl-ex/0701064
dc.identifierhttp://arxiv.org/abs/nucl-ex/0701064
dc.identifierJ.Phys.G34:S1103-1108,2007
dc.identifierdoi:10.1088/0954-3899/34/8/S165
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180714
dc.subjectNuclear Experiment
dc.titleAntiparticle to particle ratios and identified hadron spectra in Cu+Cu and Au+Au collisions
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