Spectra of identified high-pT π± and p(p¯) in Cu+Cu collisions at √sNN=200 GeV

Abelev, B. I. and Planinić, Mirko and Poljak, Nikola and Zoulkarneeva, Y. (STAR Collaboration) (2010) Spectra of identified high-pT π± and p(p¯) in Cu+Cu collisions at √sNN=200 GeV. Physical Review C, 81 (5). pp. 54907-8. ISSN 0556-2813

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Abstract

We report new results on identified (anti)proton and charged pion spectra at large transverse momenta (3<pT<10 GeV/c) from Cu+Cu collisions at √sNN=200 GeV using the STAR detector at the Relativistic Heavy Ion Collider (RHIC). This study explores the system size dependence of two novel features observed at RHIC with heavy ions: the hadron suppression at high-pT and the anomalous baryon to meson enhancement at intermediate transverse momenta. Both phenomena could be attributed to the creation of a new form of QCD matter. The results presented here bridge the system size gap between the available pp and Au+Au data, and allow for a detailed exploration of the onset of the novel features. Comparative analysis of all available 200 GeV data indicates that the system size is a major factor determining both the magnitude of the hadron spectra suppression at large transverse momenta and the relative baryon to meson enhancement.

Item Type: Article
Keywords: quantum chromodynamics, matter transverse momentum, high transverse momentum, momentum spectrum heavy ion, scattering copper Brookhaven RHIC Coll hadron, yield meson baryon, ratio nuclear matter, effect mass number, dependence impact parameter, dependence STAR 200 GeV-cms/nucleon
Date: May 2010
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2010) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982887-1006
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 10 Jun 2014 08:52
Last Modified: 24 Feb 2016 15:32
URI: http://digre.pmf.unizg.hr/id/eprint/2316

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