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Seminar

MHV amplitudes in N=4 super Yang-Mills and Wilson loops

Heslop, P (QMUL)
Wednesday 12 December 2007, 14:40-15:00

Seminar Room 1, Newton Institute

Abstract

We show how MHV amplitudes at 1 loop with an arbitrary number of external legs can be derived using Wilson loops. Our result is in precise agreement with the known expression for the infinite sequence of MHV amplitudes in N=4 super Yang-Mills. In the four-point case, we are able to reproduce the expression of the amplitude to all orders in the dimensional regularisation parameter epsilon. This prescription disentangles cleanly infrared divergences and finite terms, and leads to an intriguing one-to-one mapping between certain Wilson loop diagrams and (finite) two-mass easy box functions. We make some comments on the two loop calculation.

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