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

  • 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 RL and RO and the RO/RS 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.

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Author:Qingfeng LiORCiD, Jan SteinheimerORCiDGND, Hannah PetersenORCiDGND, Marcus BleicherORCiDGND, Horst StöckerORCiDGND
Parent Title (English):Physics Letters B
Place of publication:Amsterdam [u.a.]
Document Type:Article
Date of Publication (online):2009/03/14
Date of first Publication:2009/03/14
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2023/09/27
Tag:Dynamic transport; Equation of state; HBT correlation
Page Number:6
First Page:111
Last Page:116
Institutes:Physik / Physik
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International