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

被引：16

作者：

Kuttan, Manjunath Omana ^{[1
,2
,3
]}

Motornenko, Anton ^{[1
]}

Steinheimer, Jan ^{[1
]}

Stoecker, Horst ^{[1
,2
,4
]}

Nara, Yasushi ^{[5
]}

Bleicher, Marcus ^{[2
,4
,6
]}

机构：

[1] Frankfurt Inst Adv Studies, Ruth Moufang Str 1, D-60438 Frankfurt, Germany

[2] Goethe Univ Frankfurt, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany

[3] Giersch Sci Ctr, Xidian FIAS Int Joint Res Ctr, D-60438 Frankfurt, Germany

[4] GSI Helmholtzzentrum Schwerionenforsch GmbH, Planckstr 1, D-64291 Darmstadt, Germany

[5] Akita Int Univ, Akita 0101292, Japan

[6] GSI Helmholtzzentrum Schwerionenforsch GmbH, Helmholtz Res Acad Hesse FAIR HFHF, Campus Frankfurt,Max von Laue Str 12, D-60438 Frankfurt, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 2022年 / 82卷 / 05期

关键词：

QUANTUM MOLECULAR-DYNAMICS; HADRON RESONANCE GAS; VAN-DER-WAALS; QCD; LATTICE; MODEL; FLUCTUATIONS; SENSITIVITY; COLLISIONS;

D O I：

10.1140/epjc/s10052-022-10400-2

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

It is shown that the initial compression in central heavy ion collisions at beam energies of E-lab = 1-10A GeV depends dominantly on the underlying equation of state and onlymarginally on themodel 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.

引用

页数：12

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