Identified Baryon and Meson Distributions at Large Transverse Momenta from Au+Au Collisions at √sNN=200  GeV

Abelev, B. I. and Planinić, Mirko and Poljak, Nikola and Zuo, J. X. (STAR Collaboration) (2006) Identified Baryon and Meson Distributions at Large Transverse Momenta from Au+Au Collisions at √sNN=200  GeV. Physical Review Letters, 97 (15). pp. 152301-6. ISSN 0031-9007

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Abstract

Transverse momentum spectra of π±, p, and p¯ up to 12  GeV/c at midrapidity in centrality selected Au+Au collisions at √sNN=200  GeV are presented. In central Au+Au collisions, both π± and p(p¯) show significant suppression with respect to binary scaling at pT≳4  GeV/c. Protons and antiprotons are less suppressed than π±, in the range 1.5≲pT≲6  GeV/c. The π−/π+ and p¯/p ratios show at most a weak pT dependence and no significant centrality dependence. The p/π ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at pT≳5  GeV/c. The results at high p_T indicate that the partonic sources of π±, p, and p¯ have similar energy loss when traversing the nuclear medium.

Item Type: Article
Date: October 2006
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2006) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 01 Jul 2014 13:07
Last Modified: 01 Jul 2014 13:07
URI: http://digre.pmf.unizg.hr/id/eprint/2374

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