Constraining the symmetry energy with heavy-ion collisions and Bayesian analyses
Constraining the symmetry energy with heavy-ion collisions and Bayesian analyses
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DOI：
10.1016/j.physletb.2019.135045
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发表时间：
2017-09
影响因子：
4.4
通讯作者：
P. Morfouace;C. Tsang;Yingxun Zhang;W. G. Lynch;M. Tsang;D. Coupland;M. Youngs;Z. Chajecki;M. Famiano;T. Ghosh;G. Jhang;Jenny Lee;H. Liu;A. Sanetullaev;R. Showalter;J. Winkelbauer
中科院分区：
文献类型：
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作者：
P. Morfouace;C. Tsang;Yingxun Zhang;W. G. Lynch;M. Tsang;D. Coupland;M. Youngs;Z. Chajecki;M. Famiano;T. Ghosh;G. Jhang;Jenny Lee;H. Liu;A. Sanetullaev;R. Showalter;J. Winkelbauer
在120 MeV/u的中心Sn 112+ 112 Sn和Sn 124+ 124 Sn碰撞中，将效率校正的中子和质子能谱的单比值与双比值相结合，以提供对等矢量平均场势的密度和动量依赖性的约束.对这些数据的贝叶斯分析表明，等压线和等矢量核子有效质量m s − m v是强相关的。在m s − m v中观察到的线性相关产生了一个几乎独立的有效质量分裂的约束Δ m n p =（m n − m p）/m N=− 0.05− 0.09+ 0.09 δ。标准对称能S 0和斜率L在饱和密度下的相关约束产生对称能S（ρ s）= 16.8− 1.2+ 1.2 MeV，灵敏密度为ρ s/ρ 0= 0.43− 0.05+ 0.05。
Efficiency corrected single ratios of neutron and proton spectra in central Sn 112+ 112 Sn and Sn 124+ 124 Sn collisions at 120 MeV/u are combined with double ratios to provide constraints on the density and momentum dependencies of the isovector mean-field potential. Bayesian analyses of these data reveal that the isoscalar and isovector nucleon effective masses, m s⁎− m v⁎ are strongly correlated. The linear correlation observed in m s⁎− m v⁎ yields a nearly independent constraint on the effective mass splitting Δ m n p⁎=(m n⁎− m p⁎)/m N=− 0.05− 0.09+ 0.09 δ. The correlated constraint on the standard symmetry energy, S 0 and the slope, L at saturation density yields the values of symmetry energy S (ρ s)= 16.8− 1.2+ 1.2 MeV at a sensitive density of ρ s/ρ 0= 0.43− 0.05+ 0.05.