Evolution of the differential transverse momentum correlation function with centrality in Au + Au collisions at √sN N = 200 GeV

Agakishiev, G. and Planinić, Mirko and Poljak, Nikola and Zoulkarneeva, Y. (STAR Collaboration) (2011) Evolution of the differential transverse momentum correlation function with centrality in Au + Au collisions at √sN N = 200 GeV. Physics Letters B, 704 (5). pp. 467-473. ISSN 0370-2693

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Abstract

We present first measurements of the evolution of the differential transverse momentum correlation function, C, with collision centrality in Au + Au interactions at √sN N = 200 GeV. This observable exhibits a strong dependence on collision centrality that is qualitatively similar to that of number correlations previously reported. We use the observed longitudinal broadening of the near-side peak of C with increasing centrality to estimate the ratio of the shear viscosity to entropy density, η/s, of the matter formed in central Au + Au interactions. We obtain an upper limit estimate of η/s that suggests that the produced medium has a small viscosity per unit entropy.

Item Type: Article
Keywords: azimuthal correlations ; QGP ; heavy ion collisions
Date: 25 October 2011
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982887-1006
Publisher: Elsevier
Depositing User: Nikola Poljak
Date Deposited: 09 Feb 2015 20:15
Last Modified: 24 Feb 2016 15:01
URI: http://digre.pmf.unizg.hr/id/eprint/3661

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