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  A Link Representation for Gravity Amplitudes

He, S. (2013). A Link Representation for Gravity Amplitudes. Journal of high energy physics: JHEP, 2013(10): 139. doi:10.1007/JHEP10(2013)139.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-E67B-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-11BA-6
Genre: Journal Article

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1207.4064 (Preprint), 166KB
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 Creators:
He, Song1, Author              
Affiliations:
1Canonical and Covariant Dynamics of Quantum Gravity, AEI Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:102878              

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Free keywords: High Energy Physics - Theory, hep-th
 Abstract: We derive a link representation for all tree amplitudes in N=8 supergravity, from a recent conjecture by Cachazo and Skinner. The new formula explicitly writes amplitudes as contour integrals over constrained link variables, with an integrand naturally expressed in terms of determinants, or equivalently tree diagrams. Important symmetries of the amplitude, such as supersymmetry, parity and (partial) permutation invariance, are kept manifest in the formulation. We also comment on rewriting the formula in a GL(k)-invariant manner, which may serve as a starting point for the generalization to possible Grassmannian contour integrals.

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 Dates: 2012-07-172013
 Publication Status: Published in print
 Pages: 11 pages
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1207.4064
DOI: 10.1007/JHEP10(2013)139
 Degree: -

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Title: Journal of high energy physics : JHEP
Source Genre: Journal
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Publ. Info: Bologna, Italy : Società italiana di fisica
Pages: - Volume / Issue: 2013 (10) Sequence Number: 139 Start / End Page: - Identifier: ISSN: 1126-6708
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/111021927548002