arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0705.1603nucl-th
收藏

同位旋非对称核物质中的中子-质子质量差

Neutron-proton mass difference in isospin asymmetric nuclear matter

Ulf-G. Meißner, A. M. Rakhimov, A. Wirzba, U. T. Yakhshiev

摘要:

在一个介质修正的Skyrme模型框架下研究了重子扇区中的同位旋破缺效应。讨论了无限大非对称核物质中的中子-质子质量差。为了描述核环境对Skyrmions的影响,我们在s-和p-波通道中加入了与能量相关的带电和中性π介子光学势。本方法预测,中子-质子质量差主要取决于其强的一部分,它强烈减少中子物质。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑