Dependence of elliptic flow on number of parton degrees of freedom

Abstract

We calculate the elliptic flow parameter $v_2$ for Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV employing the parton cascade BAMPS (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 $v_2$ as a function of the transverse momentum $p_T$ is sensitive to the number of parton degrees of freedom, whereas the $p_T$ averaged $v_2$ does not. When including quarks, $v_2(p_T)$ shifts to lower $p_T$, the parton transverse momentum spectra become softer and the mean parton transverse momenta decrease.

18 pages, 10 figures; minor modification, references added

References in corpus (11)

• Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
• Scaling properties of azimuthal anisotropy in Au+Au and Cu+Cu collisions at sqrt(s_NN) = 200 GeV
• Perturbative QCD Calculations of Elliptic Flow and Shear Viscosity in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV
• Shear Viscosity in a Gluon Gas
• Transport rates and momentum isotropization of gluon matter in ultrarelativistic heavy-ion collisions
• Scalings of Elliptic Flow for a Fluid at Finite Shear Viscosity
• Elliptic flow of gluon matter in ultrarelativistic heavy-ion collisions
• Elliptic flow in transport theory and hydrodynamics
• Towards a Unified Understanding of Jet Quenching and Elliptic Flow within Perturbative QCD Parton Transport
• Discrepancy between hadron matter and quark-gluon matter in net charge transfer fluctuation
• Recent results from parton cascade and microscopic transport

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• A relativistic dissipative hydrodynamic description for systems including particle number changing processes
• Spectral BBGKY: a scalable scheme for nonlinear Boltzmann and correlation kinetics