The effect of "pre-formed" hadron potentials on the dynamics of heavy ion collisions and the HBT puzzle

Abstract

The nuclear stopping, the elliptic flow, and the HBT interferometry are calculated by the UrQMD transport model, in which potentials for "pre-formed" particles (string fragments) from color fluxtube fragmentation as well as for confined particles are considered. This description provides stronger pressure at the early stage and describes these observables better than the default cascade mode (where the "pre-formed" particles from string fragmentation are treated to be free-streaming). It should be stressed that the inclusion of potential interactions pushes down the calculated HBT radius $R_O$ and pulls up the $R_S$ so that the HBT time-related puzzle disappears throughout the energies from AGS, SPS, to RHIC.

6 pages, 4 figures. Accepted for publication in Phys. Lett. B

References in corpus (6)

• Dynamical phase trajectories for relativistic nuclear collisions
• Analyzing Correlation Functions with Tesseral and Cartesian Spherical Harmonics
• Fitted HBT radii versus space-time variances in flow-dominated models
• Transport model analysis of particle correlations in relativistic heavy ion collisions at femtometer scales
• Transport model analysis of the transverse momentum and rapidity dependence of pion interferometry at SPS energies
• Pion freeze-out as seen through HBT correlations in heavy ion collisions from FAIR/AGS to RHIC energies

Cited by in corpus (22)

• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• Progress of Quantum Molecular Dynamics model and its applications in Heavy Ion Collisions
• Effects of a phase transition on HBT correlations in an integrated Boltzmann+Hydrodynamics approach
• Mean-field update in the JAM microscopic model: Mean-field effects on collective flow in high-energy heavy-ion collisions at $\sqrt{s_{NN}}=2-20$ GeV energies
• Examination of scaling of Hanbury-Brown--Twiss radii with charged particle multiplicity
• Directed flow of $\Lambda$ in high-energy heavy-ion collisions and $\Lambda$ potential in dense nuclear matter
• A model comparison of resonance lifetime modifications, a soft equation of state and non-Gaussian effects on $\pi -\pi$ correlations at FAIR/AGS energies
• UrQMD calculations of two-pion HBT correlations in central Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV
• Transport model study of nuclear stopping in heavy ion collisions over an energy range from 0.09A GeV to 160A GeV
• Transport model study of the $m_T$-scaling for $\Lambda$, K, and $\pi$ HBT-correlations
• Proton correlations and apparent intermittency in the UrQMD model with hadronic potentials
• Study of Rotating High Energy Systems with the Differential HBT Method
• Overview of intermittency analysis in heavy-ion collisions
• Beam energy dependent two-pion interferometry and the freeze-out eccentricity of pions in heavy ion collisions at STAR
• Difficulties in probing density dependent symmetry potential with the HBT interferometry
• Effects of hadronic mean-field potentials on Hanbury-Brown-Twiss correlations in relativistic heavy-ion collisions
• Beam energy dependence of cumulants of the net-baryon, net-charge and deuteron multiplicity distributions in Au+Au collisions at $\sqrt{s_{NN}}=3.0-5.0$ GeV
• Universal Flow in the Early Stages at RHIC
• Effects of Initial Density Fluctuations on Cumulants in Au + Au Collisions at $\sqrt{s_{NN}}$ = 7.7 GeV
• Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions
• Unlocking the initial neutron density distribution from the two-pion HBT correlation function in heavy-ion collisions
• Viscosity at RHIC: Theory and Practice