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arXiv 0902.1195hep-ph
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传播子行为与夸克禁闭

Behaviour of propagator and quark confinement

V. Sauli

摘要:

通过将闵可夫斯基格林函数变换到时间欧几里德空间,计算了类时动量下受限夸克的传播子。在Schwinger-Dyson方程的框架下,通过假设胶子传播子的行为,得到了QCD夸克传播子的两种近似。在这两种情况下,我们得到了对轻夸克普遍的结果:在预期的微扰阈值以下,夸克质量函数变得复杂,得到的红外质量绝对值为具有红外相位$\simeq {π\over 2}$的$M\simeq Λ_{QCD} $。夸克的永久禁闭是通过产生复质量函数来维持的,复质量函数防止了传播子中的实极点。我们将证明类时动力学手征对称性破缺(CSB)解近似但非平凡地由标准欧氏空间中的间隙方程的解决定。

英文摘要:

The propagator of confined quarks is calculated for timelike momenta by transforming Minkowski Greens functions to the Temporal Euclidean space. Based on the framework of the Schwinger-Dyson equations the QCD quark propagator is obtained in two approximations which differ by assuming behaviour of gluon propagator. In both studied cases we get universal result for the light quarks: The quark mass function becomes complex bellow expected perturbative threshold, the obtained absolute value of the infrared mass is $M\simeq Λ_{QCD} $ with the infrared phase $\simeq {π\over 2}$. Permanent confinement of quarks is maintained by generation of the complex mass function which prevents a real pole in the propagator. We will show that timelike dynamical Chiral Symmetry Breaking (CSB) solution is approximately, but non-trivially determined by the solution of gap equation in the standard Euclidean space.

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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