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- W2086719076 abstract "We present the complete four-loop four-point amplitude in N=4 super-Yang-Mills theory, for a general gauge group and general D-dimensional covariant kinematics, and including all non-planar contributions. We use the method of maximal cuts --- an efficient application of the unitarity method --- to construct the result in terms of 50 four-loop integrals. We give graphical rules, valid in D-dimensions, for obtaining various non-planar contributions from previously-determined terms. We examine the ultraviolet behavior of the amplitude near D=11/2. The non-planar terms are as well-behaved in the ultraviolet as the planar terms. However, in the color decomposition of the three- and four-loop amplitude for an SU(N_c) gauge group, the coefficients of the double-trace terms are better behaved in the ultraviolet than are the single-trace terms. The results from this paper were an important step toward obtaining the corresponding amplitude in N=8 supergravity, which confirmed the existence of cancellations beyond those needed for ultraviolet finiteness at four loops in four dimensions. Evaluation of the loop integrals near D=4 would permit tests of recent conjectures and results concerning the infrared behavior of four-dimensional massless gauge theory." @default.
- W2086719076 created "2016-06-24" @default.
- W2086719076 creator A5016161528 @default.
- W2086719076 creator A5028727525 @default.
- W2086719076 creator A5041366361 @default.
- W2086719076 creator A5064334015 @default.
- W2086719076 creator A5073592880 @default.
- W2086719076 date "2010-12-29" @default.
- W2086719076 modified "2023-10-17" @default.
- W2086719076 title "Complete four-loop four-point amplitude in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi mathvariant=script>N</mml:mi><mml:mo>=</mml:mo><mml:mn>4</mml:mn></mml:math>super-Yang-Mills theory" @default.
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