Chicherin, D. and Doobary, R. and Eden, B. and Heslop, P. and Korchemsky, G. P. and Mason, L. and Sokatchev, E. (2015) 'Correlation functions of the chiral stress-tensor multiplet in N=4 SYM.', Journal of high energy physics., 2015 . p. 198.
We give a new method for computing the correlation functions of the chiral part of the stress-tensor supermultiplet that relies on the reformulation of N=4 SYM in twistor space. It yields the correlation functions in the Born approximation as a sum of Feynman diagrams on twistor space that involve only propagators and no integration vertices. We use this unusual feature of the twistor Feynman rules to compute the correlation functions in terms of simple building blocks which we identify as a new class of N=4 off-shell superconformal invariants. Making use of the duality between correlation functions and planar scattering amplitudes, we demonstrate that these invariants represent an off-shell generalisation of the on-shell invariants defining tree-level scattering amplitudes in N=4 SYM.
|Keywords:||Supersymmetric gauge theory, Scattering Amplitudes, Extended Supersymmetry, Superspaces.|
|Full text:||(VoR) Version of Record|
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|Publisher Web site:||http://dx.doi.org/10.1007/JHEP06(2015)198|
|Publisher statement:||Open Access, © The Authors. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.|
|Date accepted:||12 June 2015|
|Date deposited:||23 July 2015|
|Date of first online publication:||29 June 2015|
|Date first made open access:||No date available|
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