arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0803.3257hep-phnucl-th
收藏

有限温度下耦合Schwinger-Dyson方程的费米子-玻色子系统的准费米子谱

Quasifermion spectrum at finite temperature from coupled Schwinger-Dyson equations for a fermion-boson system

Masayasu Harada, Yukio Nemoto

摘要:

本文在手征不变线性西格玛模型中非微扰地研究了有限温度下费米子谱。耦合的Schwinger-Dyson方程的费米子和玻色子的发展在实时形式和数值求解。由无质量费米子与有质量玻色子的耦合,即使在强耦合区,费米子谱在某些温度下也显示出三峰结构。这意味着最初在单回路计算中发现的三峰结构即使在强耦合区域中也对高阶校正是稳定的。

英文摘要:

We nonperturbatively investigate a fermion spectrum at finite temperature in a chiral invariant linear sigma model. Coupled Schwinger-Dyson equations for fermion and boson are developed in the real time formalism and solved numerically. From the coupling of a massless fermion with a massive boson, the fermion spectrum shows a three-peak structure at some temperatures even for the strong coupling region. This means that the three-peak structure which was originally found in the one-loop calculation is stable against higher order corrections even in the strong coupling region.

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。

↑