Effects of a phase transition on HBT correlations in an integrated Boltzmann+Hydrodynamics approach

Abstract

A systematic study of HBT radii of pions, produced in heavy ion collisions in the intermediate energy regime (SPS), from an integrated (3+1)d Boltzmann+hydrodynamics approach is presented. The calculations in this hybrid approach, incorporating an hydrodynamic stage into the Ultra-relativistic Quantum Molecular Dynamics transport model, allow for a comparison of different equations of state retaining the same initial conditions and final freeze-out. The results are also compared to the pure cascade transport model calculations in the context of the available data. Furthermore, the effect of different treatments of the hydrodynamic freeze-out procedure on the HBT radii are investigated. It is found that the HBT radii are essentially insensitive to the details of the freeze-out prescription as long as the final hadronic interactions in the cascade are taken into account. The HBT radii $R_L$ and $R_O$ and the $R_O/R_S$ ratio are sensitive to the EoS that is employed during the hydrodynamic evolution. We conclude that the increased lifetime in case of a phase transition to a QGP (via a Bag Model equation of state) is not supported by the available data.

7 pages, 5 figures. Accepted by Phys. Lett. B

References in corpus (16)

• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• Space-time evolution of bulk QCD matter
• On the necessity to include event-by-event fluctuations in experimental evaluation of elliptical flow
• A Family of Equations of State Based on Lattice QCD: Impact on Flow in Ultrarelativistic Heavy-Ion Collisions
• Initial condition for hydrodynamics, partonic free streaming, and the uniform description of soft observables at RHIC
• (3+1)-Dimensional Hydrodynamic Expansion with a Critical Point from Realistic Initial Conditions
• Directed and elliptic flow in heavy ion collisions from $E_{\mathrm{beam}}=90$ MeV/nucleon to $E_{c.m.}=200$ GeV/nucleon
• The effect of "pre-formed" hadron potentials on the dynamics of heavy ion collisions and the HBT puzzle
• Microscopic models and effective equation of state in nuclear collisions at FAIR energies
• A model comparison of resonance lifetime modifications, a soft equation of state and non-Gaussian effects on $\pi -\pi$ correlations at FAIR/AGS energies
• Transport model study of the $m_T$-scaling for $\Lambda$, K, and $\pi$ HBT-correlations
• Transport model analysis of particle correlations in relativistic heavy ion collisions at femtometer scales
• Pion freeze-out as seen through HBT correlations in heavy ion collisions from FAIR/AGS to RHIC energies
• Phase Structure in a Hadronic Chiral Model
• Transport model analysis of the transverse momentum and rapidity dependence of pion interferometry at SPS energies
• Understanding the Optical Potential in HBT Interferometry

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