Effects of the momentum dependence of nuclear symmetry potential on pion observables in Sn+Sn collisions at 270 MeV/nucleon

作     者：Gao‑Feng Wei Xin Huang Qi‑Jun Zhi Ai‑Jun Dong Chang‑Gen Peng Zheng‑Wen Long Gao-Feng Wei;Xin Huang;Qi-Jun Zhi;Ai-Jun Dong;Chang-Gen Peng;Zheng-Wen Long

作者机构：School of Physics and Electronic ScienceGuizhou Normal UniversityGuiyang 550025China Guizhou Provincial Key Laboratory of Radio Astronomy and Data ProcessingGuizhou Normal UniversityGuiyang 550025China Guizhou Provincial Key Laboratory of Public Big DataGuizhou UniversityGuiyang 550025China College of PhysicsGuizhou UniversityGuiyang 550025China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2022年第33卷第12期

页      面：147-158页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.11965008 and 11405128) the Guizhou Provincial Science and Technology Foundation(No.1Y034) the PhD-funded project of Guizhou Normal University(No.GZNUD11) 

主　　题：Nuclear symmetry potential Momentum dependence Symmetry energy 

摘      要：Within a transport model,we investigated the effects of the momentum dependence of the nuclear symmetry potential on the pion observables in central Sn+Sn collisions at 270 MeV/*** this end,the quantity U^(∞)_(sym)(ρ_(0))(i.e.,the value of the nuclear symmetry potential at the saturation densityρ_(0) and infinitely large nucleon momentum)was used to characterize the momentum dependence of the nuclear symmetry *** a certain L(i.e.,the slope of the nuclear symmetry energy at(ρ_(0))),the characteristic parameter U^(∞)_(sym)(ρ_(0))of the symmetry potential significantly affects the production of−and+and their pion ***,by comparing the charged pion yields,pion ratios,and spectral pion ratios of the theoretical simulations for the reactions ^(108) Sn+^(112) Sn and ^(132)Sn+^(124)Sn with the corresponding data in the SRIT experiments,we found that our results favor a constraint on U^(∞)_(sym)(ρ_(0))(i.e.,−160_(−9)^(+18) MeV),and L is also suggested within a range of 62.7 MeVL93.1 *** addition,the pion observable for^(197)Au+^(197)Au collisions at 400 MeV/nucleon also supports the extracted value for U^(∞)_(sym)(ρ_(0)).