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arXiv 1806.07971hep-thhep-ph
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阿贝尔Higgs模型的量子规范变换、规范不变延拓和Angular Momentum分解

Quantum Gauge Transformation, Gauge-Invariant Extension and Angular Momentum Decomposition in Abelian Higgs Model

Israel Weimin Sun

摘要:

本文讨论了阿贝尔希格斯模型中的动量和角动量分解问题。通常的规范不变扩张(GIE)构造被自然地纳入到Strocchi和Wightman的量子规范变换$\grave{a}$ ${\it la}$的框架中,并由此研究了一类GIE条件下的动量和角动量分离,这类GIE条件对应于所谓的“静态规范”。使用这种语言,我发现,所谓的“发电机标准”一般不成立,甚至对修饰的物理场。在$U(1)$对称性破缺的情况下,我推广了标准的GIE结构,包括物质场的自由度,使通常的分离模式的动量和角动量的幺正规范可以纳入同一个通用的框架。当静态规范条件不能唯一地固定规范时,我证明了这个GIE结构应该被扩展以考虑剩余的规范对称性。在某些情况下,我揭示了通常的动量或角动量分离模式的物理修饰场变量需要某种类型的修改,由于底层量子规范选择的非平凡的换向器结构。最后,我给出了一些评论的一般GIE结构与可能的换向器的问题和修改的动量和角动量分离模式。

英文摘要:

I discuss the momentum and angular momentum decomposition problem in the Abelian Higgs model. The usual gauge-invariant extension (GIE) construction is incorporated naturally into the framework of quantum gauge transformation $\grave{a}$ ${\it la}$ Strocchi and Wightman and with this I investigate the momentum and angular momentum separation in a class of GIE conditions which correspond to the so-called "static gauges". Using this language I find that the so-called "generator criterion" does not generally hold even for the dressed physical field. In the case of $U(1)$ symmetry breaking, I generalize the standard GIE construction to include the matter field degrees of freedom so that the usual separation pattern of momentum and angular momentum in the unitarity gauge can be incorporated into the same universal framework. When the static gauge condition could not uniquely fix the gauge, I show that this GIE construction should be expanded to take into account the residual gauge symmetry. In some cases I reveal that the usual momentum or angular momentum separation pattern in terms of the physical dressed field variables needs some type of modification due to the nontrivial commutator structure of the underlying quantum gauge choice. Finally, I give some remarks on the general GIE constructions in connection with the possible commutator issues and modification of momentum and angular momentum separation patterns.

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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