Energy Dependent Isospin Asymmetry in Mean-Field Dynamics

Details Energy Dependent Isospin Asymmetry in Mean-Field Dynamics Energy Dependent Isospin Asymmetry in Mean-Field Dynamics

2011-09-22

arxiv.org/abs/1109.4837v2

Physics

Nuclear Physics

Nuclear Theory

21 pages, 8 figures, Nuclear Physics A in press

Scientific paper

The Lagrangian density of relativistic mean-field (RMF) theory with non-linear derivative (NLD) interactions is applied to isospin asymmetric nuclear matter. We study the symmetry energy and the density and energy dependences of nucleon selfenergies. At high baryon densities a soft symmetry energy is obtained. The energy dependence of the isovector selfenergy suppresses the Lane-type optical potential with increasing energy and predicts a $\rho$-meson induced mass splitting between protons and neutrons in isospin asymmetric matter.

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