Quantifying the Effect of Initial Fluctuations on Isospin-Sensitive Observables from Heavy-Ion Collisions at Intermediate Energies

doi:10.3390/sym13112172

	Quantifying the Effect of Initial Fluctuations on Isospin-Sensitive Observables from Heavy-Ion Collisions at Intermediate Energies
	Wang, Yongjia 3; Gao, Zepeng 2,3; Li, Qingfeng 1,3
刊名	SYMMETRY-BASEL
	2021-11-01
卷号	13 期号:11 页码:12
关键词	initial fluctuation heavy-ion collision transport model nuclear symmetry energy
DOI	10.3390/sym13112172
通讯作者	Wang, Yongjia(wangyongjia@zjhu.edu.cn) ; Li, Qingfeng(liqf@zjhu.edu.cn)
英文摘要	Initial fluctuation is one of the ingredients that washes fingerprints of the nuclear symmetry energy on observables in heavy-ion collisions. By artificially using the same initial nuclei in all collision events, the effect of the initial fluctuation on isospin-sensitive observables, e.g., the yield ratio of free neutrons with respect to protons N-n/N-p, H-3/He-3 yield ratio, the yield ratio between charged pions p(-)/p(+), and the elliptic flow ratio or difference between free neutrons and protons v(2)(n)/v(2)(p) (v(2)(n)-v(2)(p)), are studied within the ultrarelativistic quantum molecular dynamics (UrQMD) model. In practice, Au + Au collisions with impact parameter b = 5 fm and beam energy E-lab = 400 MeV/nucleon are calculated. It is found that the effect of the initialization on the yields of free protons and neutrons is small, while for the yield of pions, the directed and elliptic flows are found to be apparently influenced by the choice of initialization because of the strong memory effects. Regarding the isospin-sensitive observables, the effect of the initialization on Nn/Np and 3H/3He is negligible, while p(-)/p(+) and v(2)(n)/v(2)(p) (v(2)(n)-v(2)(p)) display a distinct difference among different initializations. The fingerprints of symmetry energy on p(-)/p(+) and v(2)(n)/v(2)(p) can be either enhanced or reduced when different initializations are utilized.
资助项目	National Natural Science Foundation of China[U2032145] ; National Natural Science Foundation of China[11875125] ; National Natural Science Foundation of China[12047568] ; National Key Research and Development Program of China[2020YFE0202002] ; Ten Thousand Talent Program of Zhejiang province[2018R52017]
WOS关键词	SYMMETRY ENERGY ; ELLIPTIC FLOW ; DYNAMICS ; EQUATION ; STATE
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	MDPI
WOS记录号	WOS:000724495500001
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Ten Thousand Talent Program of Zhejiang province
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/140048]
专题	中国科学院近代物理研究所
通讯作者	Wang, Yongjia; Li, Qingfeng
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 2.Shenyang Normal Univ, Coll Phys Sci & Technol, Shenyang 110034, Peoples R China 3.Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yongjia,Gao, Zepeng,Li, Qingfeng. Quantifying the Effect of Initial Fluctuations on Isospin-Sensitive Observables from Heavy-Ion Collisions at Intermediate Energies[J]. SYMMETRY-BASEL,2021,13(11):12.
APA	Wang, Yongjia,Gao, Zepeng,&Li, Qingfeng.(2021).Quantifying the Effect of Initial Fluctuations on Isospin-Sensitive Observables from Heavy-Ion Collisions at Intermediate Energies.SYMMETRY-BASEL,13(11),12.
MLA	Wang, Yongjia,et al."Quantifying the Effect of Initial Fluctuations on Isospin-Sensitive Observables from Heavy-Ion Collisions at Intermediate Energies".SYMMETRY-BASEL 13.11(2021):12.