Neutron–proton effective mass splitting in neutron-rich matter at normal density from analyzing nucleon–nucleus scattering data within an isospin dependent optical model

• DOI: 10.1016/j.physletb.2015.03.005
• Publication Date: 2015-03-09T17:38:07Z
• Authors: Xiao-Hua Li; Wen-Jun Guo; Bao-An Li; Lie-Wen Chen; Farrukh J. Fattoyev; William G. Newton
• Keywords: Isovector

The neutron-proton effective $k$-mass splitting in asymmetric nucleonic matter of isospin asymmetry $δ$ and normal density is found to be $m^{*}_{n-p}\equiv(m^{*}_{n}-m^{*}_{p})/m=(0.41 \pm0.15)δ$ from analyzing globally 1088 sets reaction angular differential cross sections proton elastic scattering on 130 targets with beam energies 0.783 MeV 200 MeV, 1161 data neutron 104 0.05 within an dependent non-relativistic optical potential model. It a useful reference for testing model predictions the momentum dependence nucleon isovector necessary understanding novel structures reactions rare isotopes.