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arXiv 0901.4661hep-th
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极大超对称场论中的紫外问题

The ultra-violet question in maximally supersymmetric field theories

G. Bossard, P. S. Howe, K. S. Stelle

摘要:

我们讨论了各种方法的问题,确定超对称不变量被允许作为最大超对称超杨-米尔斯和超引力理论在各个维度的反项。我们回顾了超空间非重整化定理的基础上,传统的,光锥,谐波和某些非洛伦兹协变超空间,我们写下来明确相关的不变量。前两类超空间允许二分之一BPS反项的可能性,形式分别为$F^4$和$R^4$,后两类则不然。这表明,紫外发散开始于四分之一的BPS反项,即$d^2 F^4$和$d^4 R^4$,这是支持一个完全不同的方法,基于代数重整。非重正化理论的代数形式主义进行了讨论,它示出了如何允许的超对称counterterms可以通过上同调方法确定。这些结果与迄今为止进行的所有显式计算一致。特别是,他们认为最大超引力可能在D=5的四个环和D=4的五个环处发散,除非其他不涉及超对称性或规范不变性的无穷大抑制机制在起作用。

英文摘要:

We discuss various approaches to the problem of determining which supersymmetric invariants are permitted as counterterms in maximally supersymmetric super Yang--Mills and supergravity theories in various dimensions. We review the superspace non-renormalisation theorems based on conventional, light-cone, harmonic and certain non-Lorentz covariant superspaces, and we write down explicitly the relevant invariants. While the first two types of superspace admit the possibility of one-half BPS counterterms, of the form $F^4$ and $R^4$ respectively, the last two do not. This suggests that UV divergences begin with one-quarter BPS counterterms, i.e. $d^2 F^4$ and $d^4 R^4$, and this is supported by an entirely different approach based on algebraic renormalisation. The algebraic formalism is discussed for non-renormalisable theories and it is shown how the allowable supersymmetric counterterms can be determined via cohomological methods. These results are in agreement with all the explicit computations that have been carried out to date. In particular, they suggest that maximal supergravity is likely to diverge at four loops in D=5 and at five loops in D=4, unless other infinity suppression mechanisms not involving supersymmetry or gauge invariance are at work.

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