期刊
NUCLEAR PHYSICS B
卷 794, 期 1-2, 页码 231-243出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysb.2007.11.002
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资金
- Engineering and Physical Sciences Research Council [EP/C544242/1, EP/C544250/1] Funding Source: researchfish
- Science and Technology Facilities Council [ST/G000433/1] Funding Source: researchfish
- EPSRC [EP/C544250/1] Funding Source: UKRI
- STFC [ST/G000433/1] Funding Source: UKRI
It is a remarkable fact that MHV amplitudes in maximally supersymmetric Yang-Mills theory at arbitrary loop order can be written as the product of the tree amplitude with the same helicity configuration and a universal, helicity-blind function of the kinematic invariants. In this note we show how for one-loop MHV amplitudes with an arbitrary number of external legs this universal function 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. (c) 2007 Elsevier B.V. All rights reserved.
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