Isospin dependence of nucleon effective masses in neutron-rich matter

Abstract

In this talk, we first briefly review the isospin dependence of the total nucleon effective mass $M_J^{\ast }$ inferred from analyzing nucleon-nucleus scattering data within an isospin dependent non-relativistic optical potential model, and the isospin dependence of the nucleon E-mass $M_J^{\ast ,\mathrm{E}}$ obtained from applying the Migdal-Luttinger theorem to a phenomenological single-nucleon momentum distribution in nuclei constrained by recent electron-nucleus scattering experiments. Combining information about the isospin dependence of both the nucleon total effective mass and E-mass, we then infer the isospin dependence of nucleon k-mass using the well-known relation $M_J^{\ast }=M_J^{\ast ,\mathrm{E}}\cdot M_J^{\ast ,\mathrm{k}}$. Implications of the results on the nucleon mean free path (MFP) in neutron-rich matter are discussed.

arXiv commentAn invited talk given at the 5th International Workshop on Nuclear Dynamics in Heavy-Ion Reactions (IWND2016), Xinxiang, China, May 15-20, 2016

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Cited by in corpus (6)

• Nucleon Effective Masses in Neutron-Rich Matter
• Constraining simultaneously nuclear symmetry energy and neutron-proton effective mass splitting with nucleus giant resonances from a dynamical approach
• Examination of an isospin-dependent single-nucleon momentum distribution for the isospin-asymmetric nuclear matter in heavy-ion collisions
• Nuclear giant quadruple resonance within transport approach and its constraint on nucleon effective mass
• Effects of the momentum dependence of nuclear symmetry potential on pion observables in Sn + Sn collisions at 270 MeV/nucleon
• Nuclear medium effect on nuclear modification factor of protons and pions in intermediate-energy heavy ion collisions