Time evolution of light nuclei cumulants and ratios with a first-order phase transition in the UrQMD transport model

被引:0
|
作者
Bumnedpan, Thiranat [1 ,2 ]
Steinheimer, Jan [1 ,3 ]
Reichert, Tom [1 ,4 ,5 ]
Herold, Christoph [2 ]
Limphirat, Ayut [2 ]
Bleicher, Marcus [3 ,4 ,5 ]
机构
[1] Frankfurt Inst Adv Studies FIAS, Ruth Moufang Str 1, D-60438 Frankfurt, Germany
[2] Suranaree Univ Technol, Ctr Excellence High Energy Phys & Astrophys, Sch Phys, Univ Ave 111, Nakhon Ratchasima 30000, Thailand
[3] GSI Helmholtzzentrum Schwerionenforschung GmbH, Planckstr 1, D-64291 Darmstadt, Germany
[4] Goethe Univ Frankfurt, Inst Theoret Phys, Max von Laue-Str 1, D-60438 Frankfurt, Germany
[5] GSI Helmholtzzentrum Schwerionenforsch GmbH, Helmholtz Res Acad Hesse FAIR HFHF, Campus Frankfurt,Max von Laue Str 12, D-60438 Frankfurt, Germany
基金
欧盟地平线“2020”;
关键词
QUANTUM MOLECULAR-DYNAMICS; HEAVY-ION COLLISIONS;
D O I
10.1103/PhysRevC.111.034910
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
The UrQMD model with a density dependent equation of state, including a first-order phase transition, is used to study the time dependence of baryon number and proton number susceptibilities up to third order in heavy ion reactions of Elab = 2-3 A GeV. A significant deviation from the Gaussian fluctuations of the baryon number fluctuation in coordinate space is observed. The proton number fluctuations are always suppressed as they constitute only a small fraction of the total baryon number during the dense phase of the collision. It is found that the only measurable, but small, signal would be an enhancement of the third order (or higher) proton cumulant in a finite rapidity window Ay that is larger than one unit of rapidity. In addition, it is found that the coordinate fluctuations will lead to an enhancement of cluster production due to the correlations in coordinate space. However, this enhancement is small and mainly occurs during the dense part of the collision before the system actually freezes out.
引用
收藏
页数:9
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