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Supercurrent anomaly and gauge invariance in the N=1 supersymmetric Yang-Mills theory

机译:N = 1超对称Yang-Mills理论中的超电流异常和轨距不变性

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We analyze Feynman diagram calculational issues related to the quantum breaking of supercurrent conservation in a supersymmetric non-Abelian Yang-Mills theory. For the sake of simplicity, we take a zero mass gauge field multiplet interacting with a massless Majorana spin- 1 / 2 field in the adjoint representation of S U ( 2 ) . We shed light on a long-standing controversy regarding the perturbative evaluation of the supercurrent anomaly in connection with gauge and superconformal symmetry in different frameworks. We find that only superconformal symmetry is unambiguously broken using an invariant four dimensional regularization and compare with the triangle AVV anomaly. Subtleties related to momentum routing invariance in the loops of diagrams and Clifford algebra evaluation inside divergent integrals are also discussed in connection with finite and undetermined quantities in Feynman amplitudes.
机译:在超对称非阿贝尔杨-米尔斯理论中,我们分析了与超电流守恒的量子破坏有关的费曼图计算问题。为简单起见,我们在S U(2)的伴随表示中采用零质量标量场多重体与无质量的Majorana spin-1 / 2场相互作用。我们揭示了关于在不同框架中与规范和超共形对称性有关的超流异常的摄动评估的长期争论。我们发现,使用不变的四维正则化可以唯一地打破超共形对称性,并与三角形AVV异常进行比较。还讨论了与Feynman振幅中的有限量和未定量有关的图循环中的动量路由不变性和发散积分内部的Clifford代数求值的精妙之处。

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