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arXiv 1804.07214hep-th
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规范理论红外区的一个Action和色变换问题

An Action for the Infrared Regime of Gauge Theories and the Problem of Color Transformations

A. P. Balachandran, V. P. Nair

摘要:

由于软光子的红外问题,在量子电动力学的非零荷电区中存在洛伦兹对称性的自发破缺,这一点已经被人们知道了一段时间。最近,也有人提出类似的结果也适用于非阿贝尔规范理论中的色变换。在这里,我们表明,一个行动,其中的一部分描述硬规范粒子和物质场已经进行了一个同构,可以用来分析这些问题。除了重新推导旧的结果,在这种形式主义,我们还表明,颜色变换不能统一实施微扰胶子状态,如果胶子场的任意低的能量是允许的。约束和质量间隙的影响进行了简要评论。

英文摘要:

It has been known for a while that there is spontaneous breaking of Lorentz symmetry in the nonzero charged sectors of quantum electrodynamics due to the infrared problem of soft photons. More recently, it has also been suggested that similar results hold for color transformations in a nonabelian gauge theory. Here we show that an action where a diffeomorphism has been carried out for the part describing hard gauge particles and matter fields can be used to analyze these issues. In addition to rederiving old results in this formalism, we also show that color transformations cannot be unitarily implemented on perturbative gluon states if gluon fields of arbitrarily low energy are allowed. Implications for confinement and mass gap are briefly commented upon.

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