Cumulants of the baryon number from central Au plus Au collision at E-lab=1.23 GeV/nucleon reveal the nuclear mean-field potentials

doi:10.1103/PhysRevC.98.054620

	Cumulants of the baryon number from central Au plus Au collision at E-lab=1.23 GeV/nucleon reveal the nuclear mean-field potentials
	Ye, Yunxiao 1,2; Wang, Yongjia 2; Steinheimer, Jan 3; Nara, Yasushi 3,4; Xu, Hao-jie 2; Li, Pengcheng 2,5; Lu, Dinghui 1; Li, Qingfeng 2,6; Stoecker, Horst 3,7,8
刊名	PHYSICAL REVIEW C
	2018-11-29
卷号	98
ISSN号	2469-9985
DOI	10.1103/PhysRevC.98.054620
英文摘要	Fluctuations of the baryon number in relativistic heavy-ion collisions are a promising observable to explore the structure of the QCD phase diagram. The cumulant ratios in heavy-ion collisions at intermediate energies (root sNN < 5 GeV) have not been studied to date. We investigate the effects of mean-field potential and clustering on the cumulant ratios of baryon and proton number distributions in Au+Au collisions at beam energy of 1.23 GeV/nucleon as measured by the HADES Collaboration at GSI. Ultrarelativistic quantum molecular dynamics (UrQMD) and the JAM model are used to calculate the cumulants with different mean-field potentials. It is found that the cumulant ratios are strongly time dependent. At the early stage, the effects of the potentials on the fluctuations of the particle multiplicity in momentum space are relatively weak. The mean fields enhance the fluctuations during the expansion stage, especially for small rapidity acceptance windows. The enhancement of cumulant ratios for free protons is strongly suppressed as compared to that for all baryons. The mean-field potentials and the clustering play an important role for the measured cumulant ratios at intermediate energy.
资助项目	JSPS[JP17K05448]
WOS关键词	HEAVY-ION COLLISIONS ; MOLECULAR-DYNAMICS ; EQUATION ; STATE ; FLOW ; DISTRIBUTIONS ; PHYSICS ; MATTER
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000451576500003
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/64430]
专题	中国科学院近代物理研究所
通讯作者	Wang, Yongjia
作者单位	1.Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China 2.Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China 3.Frankfurt Inst Adv Studies, Ruth Moufang Str 1, D-60438 Frankfurt, Germany 4.Akita Int Univ, Akita 0101292, Japan 5.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Gansu, Peoples R China 6.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 7.Goethe Univ Frankfurt, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany 8.GSI Helmholtzzentrum Schwerionenforsch GmbH, Planckstr 1, D-64291 Darmstadt, Germany
推荐引用方式 GB/T 7714	Ye, Yunxiao,Wang, Yongjia,Steinheimer, Jan,et al. Cumulants of the baryon number from central Au plus Au collision at E-lab=1.23 GeV/nucleon reveal the nuclear mean-field potentials[J]. PHYSICAL REVIEW C,2018,98.
APA	Ye, Yunxiao.,Wang, Yongjia.,Steinheimer, Jan.,Nara, Yasushi.,Xu, Hao-jie.,...&Stoecker, Horst.(2018).Cumulants of the baryon number from central Au plus Au collision at E-lab=1.23 GeV/nucleon reveal the nuclear mean-field potentials.PHYSICAL REVIEW C,98.
MLA	Ye, Yunxiao,et al."Cumulants of the baryon number from central Au plus Au collision at E-lab=1.23 GeV/nucleon reveal the nuclear mean-field potentials".PHYSICAL REVIEW C 98(2018).