Evolution of the differential transverse momentum correlation function with centrality in Au+Au collisions at √sNN = 200 GeV
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Author(s)
Betancourt, Michael Joseph
Balewski, Jan T.
Corliss, Ross Cameron
Hays-Wehle, James Prewitt
Leight, William Axel
Milner, Richard G
Redwine, Robert P
Seele, Joseph Patrick
Steadman, Stephen G
Surrow, Bernd
Date Issued
October 2011
Journal
Physics Letters B
Publisher
Elsevier BV
Citation
Agakishiev, G., et al. “Evolution of the Differential Transverse Momentum Correlation Function with Centrality in Au+Au Collisions at √SNN=200 GeV.” Physics Letters B, vol. 704, no. 5, Oct. 2011, pp. 467–73. © 2011 Elsevier B.V.
Version
Final published version
Abstract
We present first measurements of the evolution of the differential transverse momentum correlation function, C, with collision centrality in Au. +. Au interactions at √sNN=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. Keywords: Azimuthal correlations, QGP, Heavy ion collisions
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 3.0 Unported license
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2011.09.075
