arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1712.00554hep-phnucl-th
收藏

磁化夸克物质中的介子性质

Meson properties in magnetized quark matter

Ziyue Wang, Pengfei Zhuang

摘要:

我们研究了中性和带电介子在磁场中的性质。在双味Nambu-Jona-Lasinio模型中采用玻色化方法,通过对介子场和Schwinger相的导数展开,得到了与磁场耦合最小的有效介子拉格朗日密度.我们从有效拉格朗日密度中提取介子曲率、极点和屏蔽质量。中性π介子作为唯一的Goldstone模,控制着系统的热力学,传播着朗程夸克相互作用。磁场打破了空间对称性,夸克相互作用区从真空中的球体变成了磁场中的椭球体。

英文摘要:

We study neutral and charged meson properties in magnetic field. Taking bosolization method in a two-flavor Nambu--Jona-Lasinio model, we derive effective meson Lagrangian density with minimal coupling to the magnetic field, by employing derivative expansion for both the meson fields and Schwinger phases. We extract from the effective Lagrangian density the meson curvature, pole and screening masses. As the only Goldstone mode, the neutral pion controls the thermodynamics of the system and propagates the lang range quark interaction. The magnetic field breaks down the space symmetry, and the quark interaction region changes from a sphere in vacuum to a ellipsoid in magnetic field.

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。

↑