TY  - JOUR
A1  - Li, Qingfeng
A1  - Steinheimer, Jan
A1  - Petersen, Hannah
A1  - Bleicher, Marcus
A1  - Stöcker, Horst
T1  - Effects of a phase transition on HBT correlations in an integrated Boltzmann+hydrodynamics approach
T2  - Physics Letters B
N2  - 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.
KW  - Dynamic transport
KW  - HBT correlation
KW  - Equation of state
Y1  - 2009
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/76449
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-764492
SN  - 0370-2693
VL  - 674
IS  - 2
SP  - 111
EP  - 116
PB  - Elsevier
CY  - Amsterdam [u.a.]
ER  -