Neutron matter properties from relativistic Brueckner-Hartree-Fock theory in the full Dirac space  

作　　者：Xiaoying Qu Hui Tong Chencan Wang Sibo Wang 

机构地区：[1]School of Mechatronics Engineering,Guizhou Minzu University,Guiyang 550025,China [2]College of Physics and Materials Science,Tianjin Normal University,Tianjin 300387,China [3]Strangeness Nuclear Physics Laboratory,RIKEN Nishina Center,Wako 351-0198,Japan [4]School of Physics and Astronomy,Sun Yat-Sen University,Zhuhai 519082,China [5]Department of Physics,Chongqing University,Chongqing 401331,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2023年第4期67-74,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12205030,12147102,and 12265012);Guizhou Provincial Science and Technology Projects(Grant No.ZK[2022]203);Construction Project of Characteristic Key Laboratory in Guizhou Colleges and Universities(Grant No.KY[2021]003);Key Laboratory of Guizhou Minzu University(Grant No.GZMUSYS[2021]03);Fundamental Research Funds for the Central Universities(Grant Nos.2020CDJQY-Z003,and 2021CDJZYJH-003);MOST-RIKEN Joint Project“Ab initio investigation in nuclear physics”;the supercomputer OCTOPUS at the Cybermedia Center,Osaka University under the support of the Research Center for Nuclear Physics of Osaka University。

摘　　要：A novel description of the strongly interacting pure neutron matter(PNM)was carried out by the relativistic Brueckner-HartreeFock(RBHF)theory in the full Dirac space with Bonn A potential.The scalar and vector components of the single-particle potentials are shown as functions of the momentum and the density,and are compared with the results obtained by the RBHF calculations in the Dirac space without negative-energy states.By benchmarking the binding energies of PNM to those predicted by several ab initio methods in the nonrelativistic framework with two-and three-body forces,we find our results are softer than those from the Brueckner-Hartree-Fock theory with the inclusion of three-body force,and in harmony with the ones obtained by the Monte Carlo method and many-body perturbation theory within uncertainties.In addition,the equation of state for neutron star matter is consistent with the constraints from multi-messenger astrophysical observation and heavy-ion collision experiments.The tidal deformabilities of a binary neutron star system are calculated and found consistent with the constraints from GW170817.

关 键 词：neutron matter properties relativistic Brueckner-Hartree-Fock full Dirac space 

分 类 号：O571.5[理学—粒子物理与原子核物理]