A chiral mean-field equation-of-state in UrQMD: effects on the heavy ion compression stage

It is shown that the initial compression in central heavy ion collisions at beam energies of E lab = 1 - 10 A  GeV depends dominantly on the underlying equation of state and only marginally on the model used for the dynamical description. To do so, a procedure to incorporate any equation of state in...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2022-05, Vol.82 (5), p.1-12, Article 427
Main Authors: Omana Kuttan, Manjunath, Motornenko, Anton, Steinheimer, Jan, Stoecker, Horst, Nara, Yasushi, Bleicher, Marcus
Format: Article
Language:English
Subjects:
Analysis
Astronomy
Astrophysics and Cosmology
Beams (radiation)
Collisions (Nuclear physics)
Dynamic models
Elementary Particles
Energy
Equations of state
Equilibrium
Fluid dynamics
Fluid mechanics
Gravitational waves
Hadrons
Heavy Ions
Ionic collisions
Measurement Science and Instrumentation
Neutron stars
Nuclear Energy
Nuclear Physics
Phase transitions
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Regular Article - Theoretical Physics
Specific gravity
String Theory
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Summary:It is shown that the initial compression in central heavy ion collisions at beam energies of E lab = 1 - 10 A  GeV depends dominantly on the underlying equation of state and only marginally on the model used for the dynamical description. To do so, a procedure to incorporate any equation of state in the UrQMD transport model is introduced. In particular we compare the baryon density, temperature and pressure evolution as well as produced entropy in a relativistic ideal hydrodynamics approach and the UrQMD transport model, where the same equation of state is used in both approaches. Not only is the compression similar if the same equation of state is used in either dynamical model, but it also strongly depends on the actual equation of state. These results indicate that the equation of state can be studied with observables which are sensitive to the initial compression phase and maximum compression achieved in heavy ion collisions at these beam energies.
ISSN:1434-6052
1434-6044
1434-6052
DOI:10.1140/epjc/s10052-022-10400-2