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Beam-energy dependence of the relativistic retardation effects of electrical fields on the pi(-)/pi(+) ratio in heavy-ion collisions

文献类型：期刊论文

作者Yong, Gao-Chan8; Zhi, Qi-Jun1,7; Long, Zheng-Wen2; Zhou, Xiao-Hua3; Wei, Gao-Feng1,3,4; Ou, Li5,6
刊名PHYSICAL REVIEW C
出版日期2018-08-22
卷号98页码:024618
ISSN号2469-9985
DOI10.1103/PhysRevC.98.024618
英文摘要In this article we investigate the beam-energy dependence of relativistic retardation effects of electrical fields on the single and double pi(-)/pi(+) ratios in three heavy-ion reactions with an isospin- and momentum-dependent transport model IBUU11. With the beam energy increasing from 200 to 400 MeV/nucleon, effects of the relativistically retarded electrical fields on the pi(-)/pi(+) ratio are found to increase gradually from negligible to considerably significant as expected; it is, however, an interesting observation that the relativistic retardation effects of electrical fields on the pi(-)/pi(+) ratio become gradually insignificant as the beam energy further increases from 400 to 800 MeV/nucleon. That is to say, with the beam energy increasing, the competition of enhanced anisotropic features of retarded electrical fields and reduced duration time of the reactions gets effects of the relativistically retarded electrical fields on the pi(-)/pi(+) ratio to be maximum around 400 MeV/nucleon. Therefore, the relativistic retardation effects of electrical fields should be carefully considered in heavy-ion collisions at intermediate energy especially around 400 MeV/nucleon when using the pi(-)/pi(+) ratio as the probe of nuclear symmetry energy. Moreover, we also investigate the isospin dependence of relativistic retardation effects of electrical fields on the pi(-)/pi(+) ratio in two isobar reaction systems of Ru-96 + Ru-96 and Zr-96 + Zr-96 at the beam energies from 200 to 800 MeV/nucleon. It is shown that the relativistic retardation effects of electrical fields on the pi(-)/pi(+) ratio are independent of the isospin of reaction. Furthermore, we also examine the double pi(-)/pi(+) ratio in reactions of Zr-96 + Zr-96 over Ru-96 + Ru-96 at the beam energies from 200 to 800 MeV/nucleon with the static field and retarded field, respectively. It is shown that the double pi(-)/pi(+) ratio from two reactions is still an effective observable of symmetry energy without the interference of electrical field due to using the relativistic calculation compared to the nonrelativistic calculation.
WOS关键词NEUTRON-RICH MATTER ; SYMMETRY ENERGY ; PION-PRODUCTION ; NUCLEAR-EQUATION ; STATE ; EMISSIONS ; DENSITY ; SYSTEMS ; IMPACT ; PROBE
资助项目National Natural Science Foundation of China[11405128] ; National Natural Science Foundation of China[11465006] ; National Natural Science Foundation of China[11365004] ; National Natural Science Foundation of China[11565010] ; National Natural Science Foundation of China[11775275] ; National Natural Science Foundation of China[U1731218] ; foundation of Guangxi innovative team and distinguished scholar in institutions of higher education ; Natural Science Foundation of Guangxi province[2016GXNSFFA380001] ; Guizhou Provincial Science and Technology Department[(2016)-4008)] ; [(2015) 4015]
WOS研究方向Physics
语种英语
WOS记录号WOS:000442475700004
出版者AMER PHYSICAL SOC
资助机构National Natural Science Foundation of China ; foundation of Guangxi innovative team and distinguished scholar in institutions of higher education ; Natural Science Foundation of Guangxi province ; Guizhou Provincial Science and Technology Department
源URL[http://119.78.100.186/handle/113462/59303]  
专题近代物理研究所_理论物理研究室
作者单位1.Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550001, Guizhou, Peoples R China
2.Guizhou Univ, Coll Phys, Guiyang 550025, Guizhou, Peoples R China
3.Xijing Univ, Shaanxi Engn Res Ctr Controllable Neutron Source, Xian 710123, Shaanxi, Peoples R China
4.Xian Univ Arts & Sci, Sch Mech & Mat Engn, Xian 710065, Shaanxi, Peoples R China
5.Guangxi Normal Univ, Guangxi Key Lab Breeding Base Nucl Phys & Technol, Guilin 541004, Peoples R China
6.Guangxi Normal Univ, Coll Phys & Technol, Guilin 541004, Peoples R China
7.Guizhou Normal Univ, Guizhou Prov Key Lab Radio Astron & Data Proc, Guiyang 550001, Peoples R China
8.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式
GB/T 7714		 Yong, Gao-Chan,Zhi, Qi-Jun,Long, Zheng-Wen,et al. Beam-energy dependence of the relativistic retardation effects of electrical fields on the pi(-)/pi(+) ratio in heavy-ion collisions[J]. PHYSICAL REVIEW C,2018,98:024618.
APA Yong, Gao-Chan,Zhi, Qi-Jun,Long, Zheng-Wen,Zhou, Xiao-Hua,Wei, Gao-Feng,&Ou, Li.(2018).Beam-energy dependence of the relativistic retardation effects of electrical fields on the pi(-)/pi(+) ratio in heavy-ion collisions.PHYSICAL REVIEW C,98,024618.
MLA Yong, Gao-Chan,et al."Beam-energy dependence of the relativistic retardation effects of electrical fields on the pi(-)/pi(+) ratio in heavy-ion collisions".PHYSICAL REVIEW C 98(2018):024618.

入库方式： OAI收割

来源：近代物理研究所

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