Elliptic flow at collider energies and cascade string models: The role of hard processes and multi-Pomeron exchanges

Abstract

Centrality, rapidity, and transverse momentum dependence of hadron elliptic flow is studied in Au+Au collisions at BNL RHIC energies within the microscopic quark-gluon string model. The QGSM predictions coincide well with the experimental data at $\sqrt{s}=130$ AGeV. Further investigations reveal that multi-Pomeron exchanges and hard gluon-gluon scattering in primary collisions, accompanied by the rescattering of hadrons in spatially anisotropic system, are the key processes needed for an adequate description of the data. These processes become essentially important for heavy-ion collisions at full RHIC energy $\sqrt{s}=200$ AGeV.

arXiv commentLATEX, 12 pages incl. 4 figures, to be published in Phys. Lett. B

References in corpus (20)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• Methods for analyzing anisotropic flow in relativistic nuclear collisions
• Flow Study in Relativistic Nuclear Collisions by Fourier Expansion of Azimuthal Particle Distributions
• Elliptic flow in Au+Au collisions at sqrt(s_NN) = 130 GeV
• Elliptic flow at SPS and RHIC: from kinetic transport to hydrodynamics
• Highly Sensitive Centrality Dependence of Elliptic Flow -- A Novel Signature of the Phase Transition in QCD
• Antiflow of Nucleons at the Softest Point of the EoS
• Elliptic Flow and HBT in non-central Nuclear Collisions
• Flow systematics from SIS to SPS energies
• Elliptic flow from a parton cascade
• Anisotropic flow from AGS to LHC energies
• The physics of the centrality dependence of elliptic flow
• Determination of the reaction plane in ultrarelativistic nuclear collisions
• Soft transverse expansion in Pb(158 AGeV) on Pb collisions: preequilibrium motion or 1st order phase transition?
• Event Anisotropy in High Energy Nucleus-Nucleus Collisions
• Microscopic study of energy and centrality dependence of transverse collective flow in heavy-ion collisions
• Transverse momentum dependence of directed particle flow at 160 AGeV
• Can shadowing mimic the QCD phase transition?
• Collective flow and QCD phase transition

Cited by in corpus (28)

• A Multi-Phase Transport Model for Relativistic Heavy Ion Collisions
• Elliptic flow from two- and four-particle correlations in Au + Au collisions at sqrt{s_{NN}} = 130 GeV
• Partonic effects on the elliptic flow at relativistic heavy ion collisions
• Is early thermalization achieved only near midrapidity at RHIC ?
• Flow Measurements via Two-particle Azimuthal Correlations in Au + Au Collisions at sqrt(s_NN) = 130 GeV
• Quark Coalescence and Elliptic Flow of Charm Hadrons
• Dynamical phase trajectories for relativistic nuclear collisions
• Flavor ordering of elliptic flows at high transverse momentum
• Anisotropic flow of charged and identified hadrons in the quark-gluon string model for Au+Au collisions at sqrt(s) = 200 GeV
• Hexagonal flow v_6 as a superposition of elliptic v_2 and triangular v_3 flows
• Analysis of the first RHIC results in the String Fusion Model
• How many of the scaling trends in $pp$ collisions will be violated at sqrt{s_NN} = 14 TeV ? - Predictions from Monte Carlo quark-gluon string model
• $\Omega$ and $\varphi$ in Au + Au ~collisions at \srt~= 200 and 11.5 GeV from a multiphase transport model
• Elliptic flow at RHIC: where and when does it formed?
• Microscopic description of anisotropic flow in relativistic heavy ion collisions
• A method for analysing the jet azimuthal anisotropy in ultrarelativistic heavy ion collisions
• Study of $\pi \pi$ correlations at LHC and RHIC energies in $pp$ collisions within the quark-gluon string model
• Anisotropic flow of strange particles at RHIC
• Jets and elliptic flow correlations at low and high transverse momenta in ultrarelativistic A+A collisions
• On the origin of forward-backward multiplicity correlations in $pp$ collisions at ultrarelativistic energies
• Transition to meson-dominated matter at RHIC. Consequences for kaon flow
• Energy densities and equilibration in heavy ion collisions at sqrt(s) = 200 GeV with the quark-gluon string model
• Eccentricities, fluctuations and A-dependence of elliptic and triangular flows in heavy-ion collisions
• Phi meson production at RHIC
• Review of Monte Carlo methods for particle multiplicity evaluation
• Anisotropic flow of strange particles in heavy ion collisions at RHIC energies
• Extracting the jet azimuthal anisotropy from higher order cumulants
• Deuteron Photodisintegration in the Quark-Hadron Picture