Neutron-proton mass difference in isospin asymmetric nuclear matter

Details Neutron-proton mass difference in isospin asymmetric nuclear matter Neutron-proton mass difference in isospin asymmetric nuclear matter

2007-05-11

arxiv.org/abs/0705.1603v2

Eur.Phys.J.A32:299-309,2007

Physics

Nuclear Physics

Nuclear Theory

11 pages, 6 figures; some new references added

Scientific paper

10.1140/epja/i2007-10390-9

Isospin-breaking effects in the baryonic sector are studied in the framework of a medium-modified Skyrme model. The neutron-proton mass difference in infinite, asymmetric nuclear matter is discussed. In order to describe the influence of the nuclear environment on the skyrmions, we include energy-dependent charged and neutral pion optical potentials in the s- and p-wave channels. The present approach predicts that the neutron-proton mass difference is mainly dictated by its strong part and that it strongly decreases in neutron matter.

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