Influence of neutron-skin thickness on the pi(-)/pi(+) ratio in Pb plus Pb collisions

doi:10.1103/PhysRevC.90.014610

	Influence of neutron-skin thickness on the pi(-)/pi(+) ratio in Pb plus Pb collisions
	Wei, Gao-Feng 1,2; Li, Bao-An 1,3; Xu, Jun 4; Chen, Lie-Wen 5,6,7
刊名	PHYSICAL REVIEW C
	2014-07-21
卷号	90
ISSN号	0556-2813
DOI	10.1103/PhysRevC.90.014610
文献子类	Article
英文摘要	Within an isospin- and momentum-dependent transport model (IBUU11) using as an input nucleon density profiles from Hartree-Fock calculations based on a modified Skyrme-like (MSL) model, we study the influence of the uncertainty of the neutron skin thickness on the pi(-)/pi(+) ratio in both central and peripheral Pb + Pb collisions at beam energies of 400 MeV/nucleon and 1000 MeV/nucleon. Within the current experimental uncertainty range of neutron skin in Pb-208, while the neutron skin effect on the pi(-)/pi(+) ratio is negligible in central reactions at both energies, it increases gradually with increasing impact parameter and becomes comparable with or even larger than the symmetry energy effect in peripheral collisions especially at 400 MeV/nucleon. Moreover, we find that while the pi(-)/pi(+) ratio is larger with a softer Esym(rho) in central collisions, above certain impact parameters depending on the size of the neutron skin, a stiffer Esym(rho) can lead to a larger pi(-)/pi(+) ratio as most of the pions are produced at densities below the saturation density in these peripheral reactions. Therefore, a clear impact parameter selection is important to extract reliable information about the Esym(rho) at suprasaturation densities (size of neutron skin) from the pi(-)/pi(+) ratio in central (peripheral) heavy-ion collisions.
资助项目	Chinese Academy of Sciences[Y290061011]
WOS关键词	HEAVY-ION COLLISIONS ; MOMENTUM-DEPENDENT INTERACTIONS ; ASYMMETRIC NUCLEAR-MATTER ; MEAN-FIELD ; PION-PRODUCTION ; SYMMETRY ENERGY ; ISOSPIN PHYSICS ; ELLIPTIC FLOW ; RICH NUCLEI ; EQUATION
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000339444500003
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49909]
专题	中国科学院近代物理研究所
通讯作者	Li, Bao-An
作者单位	1.Texas A&M Univ Commerce, Dept Phys & Astron, Commerce, TX 75429 USA 2.Xian Univ Arts & Sci, Sch Phys & Mechatron Engn, Xian 710065, Peoples R China 3.Xi An Jiao Tong Univ, Dept Appl Phys, Xian 710049, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 5.Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China 6.Shanghai Jiao Tong Univ, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China 7.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Wei, Gao-Feng,Li, Bao-An,Xu, Jun,et al. Influence of neutron-skin thickness on the pi(-)/pi(+) ratio in Pb plus Pb collisions[J]. PHYSICAL REVIEW C,2014,90.
APA	Wei, Gao-Feng,Li, Bao-An,Xu, Jun,&Chen, Lie-Wen.(2014).Influence of neutron-skin thickness on the pi(-)/pi(+) ratio in Pb plus Pb collisions.PHYSICAL REVIEW C,90.
MLA	Wei, Gao-Feng,et al."Influence of neutron-skin thickness on the pi(-)/pi(+) ratio in Pb plus Pb collisions".PHYSICAL REVIEW C 90(2014).