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.

arXiv comment18 pages, 10 figures; minor modification, references added

References in corpus (37)

• A Multi-Phase Transport Model for Relativistic Heavy Ion Collisions
• Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
• Radial and elliptic flow at RHIC: further predictions
• Conformal Relativistic Viscous Hydrodynamics: Applications to RHIC results at sqrt(s_NN) = 200 GeV
• Hadronization in heavy ion collisions: Recombination and fragmentation of partons
• Parton coalescence and antiproton/pion anomaly at RHIC
• Azimuthal anisotropy in Au+Au collisions at sqrtsNN = 200 GeV
• Elliptic flow at large transverse momenta from quark coalescence
• Causal viscous hydrodynamics in 2+1 dimensions for relativistic heavy-ion collisions
• ZPC 1.0.1: a parton cascade for ultrarelativistic heavy ion collisions
• Thermalization of gluons in ultrarelativistic heavy ion collisions by including three-body interactions in a parton cascade
• Nearly Perfect Fluidity: From Cold Atomic Gases to Hot Quark Gluon Plasmas
• Scaling properties of azimuthal anisotropy in Au+Au and Cu+Cu collisions at sqrt(s_NN) = 200 GeV
• Saturation of Elliptic Flow and the Transport Opacity of the Gluon Plasma at RHIC
• A Multi-Phase Transport model for nuclear collisions at RHIC
• Parton Equilibration in Relativistic Heavy Ion Collisions
• Centrality and pseudorapidity dependence of elliptic flow for charged hadrons in Au+Au collisions at sqrt(sNN) = 200 GeV
• Elliptic flow and incomplete equilibration at RHIC
• Perturbative QCD Calculations of Elliptic Flow and Shear Viscosity in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV
• Extracting the QGP viscosity from RHIC data -- a status report from viscous hydrodynamics
• Charged hadron transverse momentum distributions 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
• New Solutions to Covariant Non-equilibrium Dynamics
• Scaling Distributions of Quarks, Mesons and Proton for all $p_T$, Energy and Centrality
• Scalings of Elliptic Flow for a Fluid at Finite Shear Viscosity
• Flavor ordering of elliptic flows at high transverse momentum
• Elliptic flow of gluon matter in ultrarelativistic heavy-ion collisions
• Measurements of transverse energy distributions in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV
• Parton rescattering and screening in Au+Au collisions at RHIC
• Shear viscosity and out of equilibrium dynamics
• Elliptic flow in transport theory and hydrodynamics
• Thermal and chemical equilibration in a gluon plasma
• Towards a Unified Understanding of Jet Quenching and Elliptic Flow within Perturbative QCD Parton Transport
• Chemical equilibration of quarks and gluons at RHIC and LHC energies
• 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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