Dependence of elliptic flow on number of parton degrees of freedom

Journal Article · Sat May 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.054901· OSTI ID:21389041

Zhe, Xu ^[1]; Greiner, Carsten ^[2]

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1. Frankfurt Institute for Advanced Studies, Ruth-Moufang-Strasse 1, D-60438 Frankfurt am Main (Germany)
2. Institut fuer Theoretische Physik, Goethe-Universitaet Frankfurt, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main (Germany)

We calculate the elliptic flow parameter v{sub 2} for Au+Au collisions at sq root(s{sub NN})=200 GeV employing the parton cascade Boltzmann approach of multiparton scatterings. Besides gluon interactions including the bremsstrahlung process, interactions with quarks are considered in an effective, but approximate, way to investigate the dependence of the collective flow on the number of parton degrees of freedom. We find that v{sub 2} as a function of the transverse momentum p{sub T} is sensitive to the number of parton degrees of freedom, whereas the p{sub T}-averaged v{sub 2} does not. When including quarks, v{sub 2}(p{sub T}) shifts to lower p{sub T}, the parton transverse momentum spectra become softer, and the mean parton transverse momenta decrease.

• OSTI ID: 21389041
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
BOSONS
BREMSSTRAHLUNG
CALCULATION METHODS
COLLISIONS
COMPUTERIZED SIMULATION
DEGREES OF FREEDOM
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY RANGE
FERMIONS
FUNCTIONS
GEV RANGE
GEV RANGE 100-1000
GLUONS
GOLD
INTERACTIONS
LINEAR MOMENTUM
METALS
QUARKS
RADIATIONS
SCATTERING
SIMULATION
SPECTRA
TRANSITION ELEMENTS
TRANSVERSE MOMENTUM