Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-10-20
JHEP 0911:108,2009
Physics
High Energy Physics
High Energy Physics - Theory
18 pages, 2 figures. In version 2 some remarks made about 0809.1632 v3 were excised since it was brought to our attention that
Scientific paper
10.1088/1126-6708/2009/11/108
The precise form of the multi-Regge asymptotics of the two-loop six-point MHV amplitude in N = 4 Super-Yang-Mills theory has been a subject of recent controversy. In this paper we utilize the amplitude/Wilson loop correspondence to obtain precise numerical results for the imaginary part of these asymptotics. The region of phase-space that we consider is interesting because it allowed Bartels, Lipatov, and Sabio Vera to determine that the two-loop six-point MHV amplitude is not fixed by the BDS ansatz. They proceeded by working in the framework of a high energy effective action, thus side-stepping the need for an arduous two-loop calculation. Our numerical results are consistent with the predictions of Bartels, Lipatov, and Sabio Vera for the leading-log asymptotics.
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