Bayesian inference on isospin splitting of nucleon effective mass from giant resonances in^(208)Pb

作     者：Zhen Zhang Xue-Bin Feng Lie-Wen Chen 张振;冯学彬;陈列文

作者机构：Sino-French Institute of Nuclear Engineering and TechnologySun Yat-sen UniversityZhuhai 519082China School of Physics and AstronomyShanghai Key Laboratory for Particle Physics and Cosmologyand Key Laboratory for Particle Astrophysics and Cosmology(MOE)Shanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2021年第45卷第6期

页      面：158-166页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：Supported in part by the National Natural Science Foundation of China(11905302,11625521) National SKA Program of China(2020SKA0120300) 

主　　题：nucleon effective mass isospin splitting of nucleon effective mass symmetry energy nuclear giant resonance Bayesian analysis 

摘      要：From a Bayesian analysis of the electric dipole polarizability,the constrained energy of isovector giant dipole resonance,the peak energy of isocalar giant quadrupole resonance,and the constrained energy of isocalar gi-ant monopole resonance in 208Pb,we extract the isoscalar and isovector effective masses in nuclear matter at satura-tion density ρ0 as m^(*)_(s.0)/m=0.87^(+)_(-004) and m^(*)_(v.0)/m=0.78^(+006)_(-006),respectively,at 90%confdence *** con-straints obtained on m^(*)_(d.0) and m^(*)_(v.0) lead to a positive isospin splitting of nucleon effective mass in asymmetric nuclear matter of isospin asymmetry σ at ρ0 as m^(*)_(n-p)/m=(0.20^(0.15)_(0.14)σ.In addition,the symmetry energy at the subsatura-tion density ρ^(*)=0.05 fm^(-3) is determined to be E_(sym)(ρ^(*))=16.7±1.3 MeV at 90%confidence level.