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arXiv 2109.09593hep-ph
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热磁化夸克物质中中性介子的性质:尺寸效应

Properties of neutral mesons in a hot and magnetized quark matter: size-dependent effects

Luciano M. Abreu, Emerson B. S. Corrêa, Elenilson S. Nery

摘要:

本文在Nambu-Jona-Lasinio模型下研究了热介质中有限尺寸效应和热磁效应对中性介子性质的影响。特别地,在具有反周期条件的环形拓扑中,利用平均场近似和Schwinger真时方法,我们计算了手征相变、组分夸克质量和介子观测量如$π^0$和$σ$质量以及π介子衰变常数随外磁场的大小、温度、化学势和强度的变化.结果表明,观测量强烈地受到相关变量的联合效应的影响,最终结果将取决于这些竞争现象的平衡。

英文摘要:

In this work we investigate the combined finite-size and thermomagnetic effects on the properties of neutral mesons in a hot medium, in the context of the Nambu--Jona-Lasinio model. In particular, by using the mean-field approximation and the Schwinger proper time method in a toroidal topology with antiperiodic conditions, we evaluate the chiral phase transition, the constituent quark mass and meson observables like the $π^0$ and $σ$ meson masses and pion decay constant under the change of the size, temperature, chemical potential and strength of external magnetic field. The results indicate that the observables are strongly affected by the conjoint effects of relevant variables, and the net result will depend on the balance of these competing phenomena.

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。

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