Neutron-proton mass difference in isospin-asymmetric nuclear matter

被引：0
作者：
U. -G. Meißner
A. M. Rakhimov
A. Wirzba
U. T. Yakhshiev
机构：
[1] Universität Bonn,Helmholtz
[2] Forschungszentrum Jülich,Institut für Strahlen
[3] Academy of Sciences of Uzbekistan, und Kernphysik (Theorie)
[4] Yonsei University,Institut für Kernphysik (Theorie)
[5] National University of Uzbekistan,Institute of Nuclear Physics
来源：
The European Physical Journal A | 2007年 / 32卷
关键词：
12.39.Fe Chiral Lagrangians; 13.40.Gp Electromagnetic form factors; 21.65.+f Nuclear matter;
D O I：
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中图分类号：
学科分类号：
摘要：
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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页码：299 / 309
页数：10
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