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arXiv 0804.1566hep-th
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幂零非交换性与重整化

Nilpotent noncommutativity and renormalization

R. Fresneda, D. M. Gitman, D. V. Vassilevich

摘要:

我们分析了双费米子NC参数的非对易(NC)理论的重整化性质。我们引入了一个新的四维标量场模型,它在循环展开的所有阶上都是可重正化的。我们证明了该模型有一个红外稳定的不动点(在单圈水平)。我们检查的NC QED(这是一个循环重整与通常的NC参数)仍然重整时,NC参数是双费米子,至少在一定程度上的单圈图与外部光子腿。我们的一般结论是,双费米子非对易性改善了NC理论的重整化性质。

英文摘要:

We analyze renormalizability properties of noncommutative (NC) theories with a bifermionic NC parameter. We introduce a new 4-dimensional scalar field model which is renormalizable at all orders of the loop expansion. We show that this model has an infrared stable fixed point (at the one-loop level). We check that the NC QED (which is one-loop renormalizable with usual NC parameter) remains renormalizable when the NC parameter is bifermionic, at least to the extent of one-loop diagrams with external photon legs. Our general conclusion is that bifermionic noncommutativity improves renormalizablility properties of NC theories.

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