Rapidity and centrality dependence of particle production for identified hadrons in Cu plus Cu collisions at root s(NN)=200 GeV

I.C. Arsene, Ian Bearden, D. Beavis, S. Bekele, C. Besliu, B. Budick, Hans Bøggild, C. Chasman, Christian Holm Christensen, Peter Christiansen, Hans Hjersing Dalsgaard, R. Debbe, Jens Jørgen Gaardhøje, Børge Svane Nielsen, C.E. Jørgensen, Casper Nygaard, Truls Martin Larsen

5 Citations (Scopus)

Abstract

The BRAHMS collaboration has measured transverse momentum spectra of pions, kaons, protons, and antiprotons at rapidities 0 and 3 for Cu+Cu collisions at sNN=200 GeV. As the collisions become more central the collective radial flow increases while the temperature of kinetic freeze-out decreases. The temperature is lower and the radial flow weaker at forward rapidity. Pion and kaon yields with transverse momenta between 1.5 and 2.5 GeV/c are suppressed for central collisions relative to scaled p+p collisions. This suppression, which increases as the collisions become more central, is consistent with jet quenching models and is also present with comparable magnitude at forward rapidity. At such rapidities, initial state effects may also be present and persistence of the meson suppression to high rapidity may reflect a combination of jet quenching and nuclear shadowing. The ratio of protons to mesons increases as the collisions become more central and is largest at forward rapidities.

Original languageEnglish
Article number014907
JournalPhysical Review C (Nuclear Physics)
Volume94
Issue number1
ISSN0556-2813
DOIs
Publication statusPublished - 20 Jul 2016

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