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arXiv 0901.3094hep-th
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具有相互作用物质的N=1/2 SYM理论

A renormalizable N=1/2 SYM theory with interacting matter

Silvia Penati, Alberto Romagnoni, Massimo Siani

摘要:

我们考虑SU(N)x U(1)规范群的伴随表示中具有手征物质的非反对易SYM理论。在一个超空间的设置和显背景协变的方法,我们调查的单圈重整化的理论时,立方超势存在。发散项的结构表明,简单地从普通理论通过用乘积交换星乘积而得到的理论是不可重正化的。此外,由于阿贝尔场与非阿贝尔场所经历的重整化不同,超势似乎不符合重整化、规范和N=1/2不变性的要求。然而,通过适当地修改U(1)(反)手征超场的二次作用量,并增加额外的耦合,我们找到了一个单圈可重整化的作用量,它明显是N=1/2超对称和超规范不变量的。我们的结论是相互作用的物质可以安全地引入NAC规范理论,与以前的结果相比。

英文摘要:

We consider nonanticommutative SYM theories with chiral matter in the adjoint representation of the SU(N) x U(1) gauge group. In a superspace setup and manifest background covariant approach we investigate the one-loop renormalization of the theory when a cubic superpotential is present. The structure of the divergent terms reveals that the theory simply obtained from the ordinary one by trading products for star products is not renormalizable. Moreover, because of the different renormalization undergone by the abelian field compared to the non-abelian ones, the superpotential seems to be incompatible with the requests of renormalizability, gauge and N=1/2 invariance. However, by a suitable modification of the quadratic action for the U(1) (anti)chiral superfields and the addition of extra couplings, we find an action which is one-loop renormalizable and manifestly N=1/2 supersymmetric and supergauge invariant. We conclude that interacting matter can be safely introduced in NAC gauge theories, in contrast with previous results.

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