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arXiv 0903.5356hep-th
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非对易Schwinger模型中的高阶导数算子

Higher Derivative Operators in the Noncommutative Schwinger Model

Kaniba Mady Keita, Feng Wu, Ming Zhong

摘要:

研究了非对易Schwinger模型。结果表明,在非对易参数达到第一非平凡阶之前,施温格质量不受时空的非对易性的影响。相反,一个更高的导数动力学项动态地产生的最低阶真空极化图。我们认为,在Seiberg-Witten映射的框架下,具有时空非对易性的场论的非么正性特征是存在高阶导数动力学项。酉理论的$θ$扩展版本不会产生最低阶高阶导数二次项。

英文摘要:

A study of the noncommutative Schwinger model is presented. It is shown that the Schwinger mass is not modified by the noncommutativity of spacetime till the first nontrivial order in the noncommutative parameter. Instead, a higher derivative kinetic term is dynamically generated by the lowest-order vacuum polarization diagrams. We argue that in the framework of the Seiberg-Witten map the feature of non-unitarity for a field theory with space-time noncommutativity is characterized by the presence of higher derivative kinetic terms. The $θ$-expanded version of a unitary theory will not generate the lowest-order higher derivative quadratic terms.

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