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arXiv 1303.7210hep-ph
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胶子极化的规范不变量描述

Gauge Invariant Descriptions of Gluon Polarizations Revisited

Zhi-Qiang Guo, Ivan Schmidt

摘要:

在规范场可以分解为物理部分和纯规范部分的前提下,我们研究了胶子极化的规范不变描述的可行性。我们表明,规范不变的角动量电流可以从规范变量诺特电流的总和。我们提出了新的表达式的纯规范场,这是用来制定规范不变的胶子自旋和光子自旋的描述。我们证明了Chern-Simons电流的规范不变延拓可以描述Laguerre-Gauss激光模的自旋。我们还讨论了规范不变算符与由狄拉克变量构造的部分子分布之间的关系。

英文摘要:

We examine the feasibility of gauge invariant descriptions of the gluon polarization following the proposal that a gauge field can be decomposed into its physical part and its pure gauge part. We show that gauge invariant angular momentum currents can be constructed from summations of gauge variant Noether currents. We present novel expressions of the pure gauge field, which are used to formulate gauge invariant descriptions of the gluon spin and the photon spin. We show that the gauge invariant extension of the Chern-Simons current can describe the spins of the Laguerre-Gauss laser modes. We also discuss the relation of gauge invariant operators and the parton distributions constructed from Dirac variables.

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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