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Influence of neutron-skin thickness on the pi(-)/pi(+) ratio in Pb plus Pb collisions
Wei, GF; Li, BA; Xu, J; Chen, LW; wei.gaofeng@foxmail.com; Bao-An.Li@tamuc.edu; xujun@sinap.ac.cn; lwchen@sjtu.edu.cn
2014
Source PublicationPHYSICAL REVIEW C
ISSN0556-2813
Volume90Issue:1
AbstractWithin 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.
KeywordHeavy-ion Collisions Momentum-dependent Interactions Asymmetric Nuclear-matter Mean-field Pion-production Symmetry Energy Isospin Physics Elliptic Flow Rich Nuclei Equation
Indexed BySCI
Language英语
WOS IDWOS:000339444500003
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14193
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authorwei.gaofeng@foxmail.com; Bao-An.Li@tamuc.edu; xujun@sinap.ac.cn; lwchen@sjtu.edu.cn
Recommended Citation
GB/T 7714
Wei, GF,Li, BA,Xu, J,et al. Influence of neutron-skin thickness on the pi(-)/pi(+) ratio in Pb plus Pb collisions[J]. PHYSICAL REVIEW C,2014,90(1).
APA Wei, GF.,Li, BA.,Xu, J.,Chen, LW.,wei.gaofeng@foxmail.com.,...&lwchen@sjtu.edu.cn.(2014).Influence of neutron-skin thickness on the pi(-)/pi(+) ratio in Pb plus Pb collisions.PHYSICAL REVIEW C,90(1).
MLA Wei, GF,et al."Influence of neutron-skin thickness on the pi(-)/pi(+) ratio in Pb plus Pb collisions".PHYSICAL REVIEW C 90.1(2014).
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