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arXiv 1104.5480hep-th
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N=8个反项和E7(7)电流守恒

N=8 Counterterms and E7(7) Current Conservation

Renata Kallosh

摘要:

我们使用动量空间螺旋度形式研究了在N=8个超引力反项存在下E7(7)Noether-Gaillard-Zumino流的守恒性,这大大简化了计算.主要结果是E7(7)电流守恒恒等式禁止任何回路阶L的4点反项。我们还澄清了线性化和完整的非线性超不变量作为候选counterterms之间的关系。这使我们能够证明,所有的n-点在L=7,8的counterterterterms是禁止的,因为他们提供了一个非线性的4-点的完成。这支持并证明了我们在arXiv:1103.4115中关于N=8超引力的微扰UV有限性的一般证明。

英文摘要:

We examine conservation of the E7(7) Noether-Gaillard-Zumino current in the presence of N=8 supergravity counterterms using the momentum space helicity formalism, which significantly simplifies the calculations. The main result is that the 4-point counterterms at any loop order L are forbidden by the E7(7) current conservation identity. We also clarify the relation between linearized and full non-linear superinvariants as candidate counterterms. This enables us to show that all n-point counterterms at L=7, 8 are forbidden since they provide a non-linear completions of the 4-point ones. This supports and exemplifies our general proof in arXiv:1103.4115 of perturbative UV finiteness of N=8 supergravity.

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