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arXiv 0904.3260hep-th
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非反对易U(1)SYM理论:重整化、不动点和红外稳定性

Nonanticommutative U(1) SYM theories: Renormalization, fixed points and infrared stability

Marco S. Bianchi, Silvia Penati, Alberto Romagnoni, Massimo Siani

摘要:

在规范群的伴随表象中具有手征物质的可重正化非反对易SYM理论最近在[arXiv:0901.3094]中被构造。在本文中,我们集中在U*(1)的情况下,物质通过立方超势相互作用。对于一个单一的味道,在超空间设置和显式背景协变的方法,我们执行完整的单圈重整化和计算的beta函数的所有耦合出现在行动。然后我们将计算推广到SU(3)味物质的情况下,与一个立方超势视为一个非平凡的NAC推广的普通阿贝尔N=4 SYM和它的边缘变形。我们发现,在普通交换的情况下,NAC N=4理论是一个循环有限的。我们提供了一般的参数支持所有循环有限性。相反,通过边缘算子使超势变形会产生一般为非零的β函数。我们研究了不动点的谱和RG流。我们发现非反交换性总是使不动点不稳定。

英文摘要:

Renormalizable nonanticommutative SYM theories with chiral matter in the adjoint representation of the gauge group have been recently constructed in [arXiv:0901.3094]. In the present paper we focus on the U*(1) case with matter interacting through a cubic superpotential. For a single flavor, in a superspace setup and manifest background covariant approach we perform the complete one-loop renormalization and compute the beta-functions for all couplings appearing in the action. We then generalize the calculation to the case of SU(3) flavor matter with a cubic superpotential viewed as a nontrivial NAC generalization of the ordinary abelian N=4 SYM and its marginal deformations. We find that, as in the ordinary commutative case, the NAC N=4 theory is one-loop finite. We provide general arguments in support of all-loop finiteness. Instead, deforming the superpotential by marginal operators gives rise to beta-functions which are in general non-vanishing. We study the spectrum of fixed points and the RG flows. We find that nonanticommutativity always makes the fixed points unstable.

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