Bullimore, Mathew and Mason, Lionel and Skinner, David (2010) 'MHV diagrams in momentum twistor space.', Journal of high energy physics., 2010 (12). 032.
We show that there are remarkable simplifications when the MHV diagram formalism for N=4 super Yang-Mills is reformulated in momentum twistor space. The vertices are replaced by unity while each propagator becomes a dual superconformal ‘R-invariant’ whose arguments may be read off from the diagram, and include an arbitrarily chosen reference twistor. The momentum twistor MHV rules generate a formula for the full, all-loop planar integrand for the super Yang-Mills S-matrix that is manifestly dual superconformally invariant up to the choice of a reference twistor. We give a general proof of this reformulation and illustrate its use by computing the momentum twistor NMHV and N2MHV tree amplitudes and the integrands of the MHV and NMHV 1-loop and the MHV 2-loop planar amplitudes.
|Full text:||(AM) Accepted Manuscript|
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|Publisher Web site:||https://doi.org/10.1007/JHEP12(2010)032|
|Publisher statement:||The final publication is available at Springer via https://doi.org/10.1007/JHEP12(2010)032.|
|Date accepted:||27 September 2010|
|Date deposited:||02 July 2018|
|Date of first online publication:||06 December 2010|
|Date first made open access:||No date available|
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