Effects of mean-field and softening of equation of state on elliptic flow in Au＋Au collisions at √^SNN=5 GeV from the JAM model
We perform a systematic study of elliptic flow（v2） in Au＋Au collisions at √^SNN = 5 GeV by using a microscopic transport model, JAM. The centrality, pseudorapidity, transverse momentum and beam energy dependence of v2 for charged as well as identified hadrons are studied. We investigate the effects...
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| Published in | 中国物理C：英文版 Vol. 42; no. 2; pp. 112 - 118 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.02.2018
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-1137 0254-3052 |
| DOI | 10.1088/1674-1137/42/2/024001 |
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| Summary: | We perform a systematic study of elliptic flow（v2） in Au＋Au collisions at √^SNN = 5 GeV by using a microscopic transport model, JAM. The centrality, pseudorapidity, transverse momentum and beam energy dependence of v2 for charged as well as identified hadrons are studied. We investigate the effects of both the hadronic mean-field and the softening of equation of state（EoS） on elliptic flow. The softening of the EoS is realized by imposing attractive orbits in two body scattering, which can reduce the pressure of the system. We found that the softening of the EoS leads to the enhancement of v2, while the hadronic mean-field suppresses v2 relative to the cascade mode. It indicates that elliptic flow at high baryon density regions is highly sensitive to the EoS and the enhancement of v2 may probe the signature of a first-order phase transition in heavy-ion collisions at beam energies of a strong baryon stopping region. |
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| Bibliography: | 11-5641/O4 heavy-ion collisions, elliptic flow, equation of state, QCD phase transition We perform a systematic study of elliptic flow（v2） in Au＋Au collisions at √^SNN = 5 GeV by using a microscopic transport model, JAM. The centrality, pseudorapidity, transverse momentum and beam energy dependence of v2 for charged as well as identified hadrons are studied. We investigate the effects of both the hadronic mean-field and the softening of equation of state（EoS） on elliptic flow. The softening of the EoS is realized by imposing attractive orbits in two body scattering, which can reduce the pressure of the system. We found that the softening of the EoS leads to the enhancement of v2, while the hadronic mean-field suppresses v2 relative to the cascade mode. It indicates that elliptic flow at high baryon density regions is highly sensitive to the EoS and the enhancement of v2 may probe the signature of a first-order phase transition in heavy-ion collisions at beam energies of a strong baryon stopping region. Chen1, Xiaofeng Luo1,2, Feng Liu1, Yasushi Nara3,4 （1 Institute of Particle Physics and Key Laboratory of Quark＆Lepton Physics （MOE）, Central China Normal University, Wuhan 430079, China ;2 Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA;3kita International University, Yuwa, Akita-city 010-1292, Japan;4 Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main, Germany） |
| ISSN: | 1674-1137 0254-3052 |
| DOI: | 10.1088/1674-1137/42/2/024001 |