Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-01-18
Nucl.Phys. A709 (2002) 440-450
Physics
Nuclear Physics
Nuclear Theory
Total 17 pages with 18 figures
Scientific paper
10.1016/S0375-9474(02)01074-6
The space-time evolution of the hot and dense matter formed after the collisions of heavy nuclei at ultra-relativistic energies is investigated using (3+1) dimensional hydrodynamical models. The effects of the spectral shift of the hadronic properties are incorporated in the equation of state (EOS) of the evolving matter. In-medium shift of hadronic properties are considered for Quantum Hadrodynamics (QHD) and universal scaling scenarios. It is found that the EOS for the hadronic matter for universal scaling of hadronic masses (except pseudoscalar mesons) is similar to the recent lattice results. We observe that the space-time volume of the hadronic matter at the freeze-out is considerably different from the one when medium effects on the hadrons are ignored. The sensitivity of the results on the initial radial velocity profile is investigated. The transverse mass spectra of pions and protons of NA49 collaboration are analyzed.
Alam Jan-e
Patra Binoy K.
Roy Pradip
Sarkar Sourav
Sinha Bikash
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