Transport model study of the $m_T$-scaling for $\Lambda$, K, and $\pi$ HBT-correlations

Abstract

Based on the microscopic transport model UrQMD in which hadronic and string degrees of freedom are employed, the HBT parameters in the longitudinal co-moving system are investigated for charged pion and kaon, and $\Lambda$ sources in heavy ion collisions (HICs) at SPS and RHIC energies. In the Cascade mode, $R_O$ and the $R_L$ at high SPS and RHIC energies do not follow the $m_T$-scaling, however, after considering a soft equation of state with momentum dependence (SM-EoS) for formed baryons and a density-dependent Skyrme-like potential for ``pre-formed'' particles, the HBT radii of pions and kaons and even those of $\Lambda$s with large transverse momenta follow the $m_T$-scaling function $R=3/\sqrt{m_T}$ fairly well.

arXiv comment6 pages, 5 figs

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• Effects of a phase transition on HBT correlations in an integrated Boltzmann+Hydrodynamics approach
• Examination of scaling of Hanbury-Brown--Twiss radii with charged particle multiplicity
• The Long Slow Death of the HBT Puzzle, Proceedings for QM 2009
• A model comparison of resonance lifetime modifications, a soft equation of state and non-Gaussian effects on $\pi -\pi$ correlations at FAIR/AGS energies
• Proton correlations and apparent intermittency in the UrQMD model with hadronic potentials
• Helium-3 production from Pb+Pb collisions at SPS energies with the UrQMD model and the traditional coalescence afterburner
• Light Nuclei Femtoscopy and Baryon Interactions in 3 GeV Au+Au Collisions at RHIC
• Elliptic flow splitting between protons and antiprotons from hadronic potentials
• Production and rescattering of strange baryons at SPS energies in a transport model with hadron potentials
• An explanation of the elliptic flow difference between proton and anti-proton from the UrQMD model with hadron potentials
• System-size dependence of the pion freeze-out volume as a potential signature for the phase transition to a Quark Gluon Plasma
• Unlocking the initial neutron density distribution from the two-pion HBT correlation function in heavy-ion collisions
• Extracting temperature and transverse flow by fitting transverse mass spectra and HBT radii together