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.
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。
