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  R^4 counterterm and E7(7) symmetry in maximal supergravity

Brödel, J., & Dixon, L. J. (2010). R^4 counterterm and E7(7) symmetry in maximal supergravity. Journal of high energy physics: JHEP, 2010(05): 003. doi:10.1007/JHEP05(2010)003.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-6140-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-50CC-0
Genre: Journal Article

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Brödel, Johannes1, Author              
Dixon, L. J., Author
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1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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 Abstract: The coefficient of a potential R^4 counterterm in N=8 supergravity has been shown previously to vanish in an explicit three-loop calculation. The R^4 term respects N=8 supersymmetry; hence this result poses the question of whether another symmetry could be responsible for the cancellation of the three-loop divergence. In this article we investigate possible restrictions from the coset symmetry E7(7)/SU(8), using a double-soft scalar limit relation derived recently by Arkani-Hamed et al. In order to implement the relation, we make use of the fact that the R^4 term occurs in the low-energy expansion of closed-string tree-level amplitudes. We find that the matrix elements of R^4 that we investigated all obey the double-soft scalar limit relation, suggesting that E7(7) is also respected by the R^4 term.

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 Dates: 2010
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: eDoc: 439685
arXiv: 0911.5704
DOI: 10.1007/JHEP05(2010)003
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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: 2010 (05) Sequence Number: 003 Start / End Page: - Identifier: ISSN: 1126-6708
CoNE: /journals/resource/111021927548002