Elliptic flow of gluon matter in ultrarelativistic heavy-ion collisions

Journal Article · Thu Jan 15 04:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.014904· OSTI ID:21202707

Zhe, Xu; Greiner, Carsten ^[1]

---

1. Institut fuer Theoretische Physik, Goethe-Universitaet Frankfurt, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main (Germany)

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.

• OSTI ID: 21202707
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

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