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Title: 200 A GeV Au+Au Collisions Serve a Nearly Perfect Quark-Gluon Liquid

Abstract

A new robust method to extract the specific shear viscosity ({eta}/s){sub QGP} of a quark-gluon plasma (QGP) at temperatures T{sub c}<T < or approx. 2T{sub c} from the centrality dependence of the eccentricity-scaled elliptic flow v{sub 2}/{epsilon} measured in ultrarelativistic heavy-ion collisions is presented. Coupling viscous fluid dynamics for the QGP with a microscopic transport model for hadronic freeze-out we find for 200 A GeV Au+Au collisions that v{sub 2}/{epsilon} is a universal function of multiplicity density (1/S)(dN{sub ch}/dy) that depends only on the viscosity but not on the model used for computing the initial fireball eccentricity {epsilon}. Comparing with measurements we find 1<4{pi}({eta}/s){sub QGP}<2.5 where the uncertainty range is dominated by model uncertainties for the values of {epsilon} used to normalize the measured v{sub 2}.

Authors:
 [1];  [2]; ;  [3];  [4]
  1. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  2. Department of Physics, Duke University, Durham, North Carolina 27708 (United States)
  3. Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States)
  4. Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)
Publication Date:
OSTI Identifier:
21538326
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 19; Other Information: DOI: 10.1103/PhysRevLett.106.192301; (c) 2011 American Institute of Physics; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COLLISIONS; COUPLING; DENSITY; FLUID MECHANICS; FREEZING OUT; GEV RANGE 100-1000; GLUONS; GOLD; HADRONS; HEAVY ION REACTIONS; LIQUIDS; MULTIPLICITY; QUARK MATTER; QUARKS; RELATIVISTIC RANGE; SHEAR; TRANSPORT THEORY; VISCOSITY; BOSONS; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; FERMIONS; FLUIDS; GEV RANGE; MATTER; MECHANICS; METALS; NUCLEAR REACTIONS; PHYSICAL PROPERTIES; SEPARATION PROCESSES; TRANSITION ELEMENTS

Citation Formats

Huichao, Song, Department of Physics, Ohio State University, Columbus, Ohio 43210, Bass, Steffen A, Heinz, Ulrich, Shen, Chun, Hirano, Tetsufumi, and Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720. 200 A GeV Au+Au Collisions Serve a Nearly Perfect Quark-Gluon Liquid. United States: N. p., 2011. Web. doi:10.1103/PHYSREVLETT.106.192301.
Huichao, Song, Department of Physics, Ohio State University, Columbus, Ohio 43210, Bass, Steffen A, Heinz, Ulrich, Shen, Chun, Hirano, Tetsufumi, & Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720. 200 A GeV Au+Au Collisions Serve a Nearly Perfect Quark-Gluon Liquid. United States. https://doi.org/10.1103/PHYSREVLETT.106.192301
Huichao, Song, Department of Physics, Ohio State University, Columbus, Ohio 43210, Bass, Steffen A, Heinz, Ulrich, Shen, Chun, Hirano, Tetsufumi, and Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720. 2011. "200 A GeV Au+Au Collisions Serve a Nearly Perfect Quark-Gluon Liquid". United States. https://doi.org/10.1103/PHYSREVLETT.106.192301.
@article{osti_21538326,
title = {200 A GeV Au+Au Collisions Serve a Nearly Perfect Quark-Gluon Liquid},
author = {Huichao, Song and Department of Physics, Ohio State University, Columbus, Ohio 43210 and Bass, Steffen A and Heinz, Ulrich and Shen, Chun and Hirano, Tetsufumi and Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720},
abstractNote = {A new robust method to extract the specific shear viscosity ({eta}/s){sub QGP} of a quark-gluon plasma (QGP) at temperatures T{sub c}<T < or approx. 2T{sub c} from the centrality dependence of the eccentricity-scaled elliptic flow v{sub 2}/{epsilon} measured in ultrarelativistic heavy-ion collisions is presented. Coupling viscous fluid dynamics for the QGP with a microscopic transport model for hadronic freeze-out we find for 200 A GeV Au+Au collisions that v{sub 2}/{epsilon} is a universal function of multiplicity density (1/S)(dN{sub ch}/dy) that depends only on the viscosity but not on the model used for computing the initial fireball eccentricity {epsilon}. Comparing with measurements we find 1<4{pi}({eta}/s){sub QGP}<2.5 where the uncertainty range is dominated by model uncertainties for the values of {epsilon} used to normalize the measured v{sub 2}.},
doi = {10.1103/PHYSREVLETT.106.192301},
url = {https://www.osti.gov/biblio/21538326}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 19,
volume = 106,
place = {United States},
year = {Fri May 13 00:00:00 EDT 2011},
month = {Fri May 13 00:00:00 EDT 2011}
}