Ultraviolet Behavior of N=8 Supergravity at Four Loops

被引：196

作者：

Bern, Z. ^{[1
]}

Carrasco, J. J. M. ^{[1
]}

Dixon, L. J. ^{[2
]}

Johansson, H. ^{[1
]}

Roiban, R. ^{[3
]}

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[2] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94309 USA

[3] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 08期

关键词：

TREE AMPLITUDES; YANG-MILLS; RENORMALIZABILITY; DIVERGENCES; UNITARITY; GRAVITY;

D O I：

10.1103/PhysRevLett.103.081301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe the construction of the complete four-loop four-particle amplitude of N=8 supergravity. The amplitude is ultraviolet finite, not only in four dimensions, but in five dimensions as well. The observed extra cancellations provide additional nontrivial evidence that N=8 supergravity in four dimensions may be ultraviolet finite to all orders of perturbation theory.

引用

页数：4

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