Roles of N?→NN and πN→? Reactions in Heavy-Ion Collisions at Intermediate Energies

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英文篇名：Roles of N?→NN and πN→? Reactions in Heavy-Ion Collisions at Intermediate Energies 作者：谢文杰 ; 王丽君 ; 苏军 ; 张丰收 英文作者：Wen-Jie Xie;Li-Jun Wang;Jun Su;Feng-Shou Zhang;Department of Physics, Yuncheng University;Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University;The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University; 英文关键词：transport model;;pion production;;N?→NN;;πN→? 中文刊名：CITP 英文刊名：理论物理(英文版) 机构：Department of Physics, Yuncheng University;Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University;The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University; 出版日期：2019-02-01 出版单位：Communications in Theoretical Physics 年：2019 期：v.71 基金：Supported by the National Natural Science Foundation of China under Grant No.11505150;the National Natural Science Foundation of China under Grant No.11405278;; the Yuncheng University Research Project under Grant No.YQ-2014014 语种：英文; 页：CITP201902007 页数：6 CN：02 ISSN：11-2592/O3 分类号：65-70

摘要

Within the framework of the isospin-dependent transport model, the roles of the reactions N? → NN and πN→ ? are investigated through simulating heavy-ion collisions at 1000 MeV/nucleon. The absorption process N? → NN plays an important role for heavy impact systems and small impact parameters than for light impact systems and large impact parameters. The resorption process πN→ ? is of importance for heavy impact systems and large impact parameters than for light impact systems and small impact parameters. Thus the influences of the reaction N? → N N(πN→ ?) on pion production dynamics can be neglected in heavy-ion collisions for smaller(larger) impact parameters and light systems. It is the reaction πN→ ? that causes the anti-correlation of pions and nucleons in the rapidity dependence of the directed flow.
        Within the framework of the isospin-dependent transport model, the roles of the reactions N? → NN and πN → ? are investigated through simulating heavy-ion collisions at 1000 MeV/nucleon. The absorption process N? → NN plays an important role for heavy impact systems and small impact parameters than for light impact systems and large impact parameters. The resorption process πN → ? is of importance for heavy impact systems and large impact parameters than for light impact systems and small impact parameters. Thus the influences of the reaction N? → N N(πN → ?) on pion production dynamics can be neglected in heavy-ion collisions for smaller(larger) impact parameters and light systems. It is the reaction πN → ? that causes the anti-correlation of pions and nucleons in the rapidity dependence of the directed flow.

引文

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