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Title: Elliptic flow of gluon matter in ultrarelativistic heavy-ion collisions

Abstract

Employing a perturbative QCD based parton cascade we calculate the elliptic flow v{sub 2} and its transverse momentum dependence v{sub 2}(p{sub T}) for the gluon matter created in Au+Au collisions at {radical}(s{sub NN})=200 GeV. To make comparisons with the experimental data at the BNL Relativistic Heavy Ion Collider (RHIC), parton-hadron duality is assumed. We find that whereas the integrated v{sub 2} matches the experimental data, the gluon (or pion) v{sub 2}(p{sub T}) is about 20-50% smaller than the experimental data. Hadronization via gluon fragmentation and quark recombination seems to be the key to explaining the necessary jump of v{sub 2}(p{sub T}) from the partonic to the hadronic phase. We also show that the elliptic flow values moderately depend on the chosen freezeout condition, which will thus constrain the shear viscosity to the entropy density ratio of the quark gluon plasma created at RHIC.

Authors:
;  [1]
  1. Institut fuer Theoretische Physik, Goethe-Universitaet Frankfurt, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main (Germany)
Publication Date:
OSTI Identifier:
21202707
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 79; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevC.79.014904; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ATOM-ATOM COLLISIONS; BNL; BROOKHAVEN RHIC; COLLISIONS; COMPARATIVE EVALUATIONS; DENSITY; DUALITY; ENTROPY; FRAGMENTATION; GEV RANGE 100-1000; GLUONS; GOLD; HEAVY ION REACTIONS; PERTURBATION THEORY; PIONS; QUANTUM CHROMODYNAMICS; QUARK MATTER; QUARKS; RECOMBINATION; RELATIVISTIC RANGE; SIMULATION; TRANSVERSE MOMENTUM; VISCOSITY

Citation Formats

Zhe, Xu, and Greiner, Carsten. Elliptic flow of gluon matter in ultrarelativistic heavy-ion collisions. United States: N. p., 2009. Web. doi:10.1103/PHYSREVC.79.014904.
Zhe, Xu, & Greiner, Carsten. Elliptic flow of gluon matter in ultrarelativistic heavy-ion collisions. United States. https://doi.org/10.1103/PHYSREVC.79.014904
Zhe, Xu, and Greiner, Carsten. Thu . "Elliptic flow of gluon matter in ultrarelativistic heavy-ion collisions". United States. https://doi.org/10.1103/PHYSREVC.79.014904.
@article{osti_21202707,
title = {Elliptic flow of gluon matter in ultrarelativistic heavy-ion collisions},
author = {Zhe, Xu and Greiner, Carsten},
abstractNote = {Employing a perturbative QCD based parton cascade we calculate the elliptic flow v{sub 2} and its transverse momentum dependence v{sub 2}(p{sub T}) for the gluon matter created in Au+Au collisions at {radical}(s{sub NN})=200 GeV. To make comparisons with the experimental data at the BNL Relativistic Heavy Ion Collider (RHIC), parton-hadron duality is assumed. We find that whereas the integrated v{sub 2} matches the experimental data, the gluon (or pion) v{sub 2}(p{sub T}) is about 20-50% smaller than the experimental data. Hadronization via gluon fragmentation and quark recombination seems to be the key to explaining the necessary jump of v{sub 2}(p{sub T}) from the partonic to the hadronic phase. We also show that the elliptic flow values moderately depend on the chosen freezeout condition, which will thus constrain the shear viscosity to the entropy density ratio of the quark gluon plasma created at RHIC.},
doi = {10.1103/PHYSREVC.79.014904},
url = {https://www.osti.gov/biblio/21202707}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 1,
volume = 79,
place = {United States},
year = {2009},
month = {1}
}