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arXiv 0906.4874hep-th
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关于手征QED与Faddeevian anomaly的规范不变性和BRST不变性

On the gauge and BRST invariance of the chiral QED with Faddeevian anomaly

Anisur Rahaman, Safia Yasmin, Sahazada Aziz

摘要:

考虑了具有Faddeevian反常的手征Schwinger模型。结果发现,施加手征约束,该模型可以表示为手征玻色子。当用手征玻色子表示时,该模型仍然是反常的,高斯定律在其自身之间给出了反常的泊松括号。尽管如此,系统的BRST量化是可能的。对应于该理论的Wess-Zumino项在量子化过程中自动出现。还构造了该模型的规范不变量重构。与前一个不同的是,这里的规范不变性是在没有相空间任何扩展的情况下完成的。这个规范不变模型映射到矢量Schwinger模型上,而$a=2$的手征Schwinger模型的规范不变模型有一个质量相同的大质量场,但是这里得到的规范不变模型并没有映射到这个大质量场上。

英文摘要:

Chiral Schwinger model with the Faddeevian anomaly is considered. It is found that imposing a chiral constraint this model can be expressed in terms of chiral boson. The model when expressed in terms of chiral boson remains anomalous and the Gauss law of which gives anomalous Poisson brackets between itself. In spite of that a systematic BRST quantization is possible. The Wess-Zumino term corresponding to this theory appears automatically during the process of quantization. A gauge invariant reformulation of this model is also constructed. Unlike the former one gauge invariance is done here without any extension of phase space. This gauge invariant version maps onto the vector Schwinger model.The gauge invariant version of the chiral Schwinger model for $a=2$ has a massive field with identical mass however gauge invariant version obtained here does not map on to that.

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