dc.identifier.uri |
http://dx.doi.org/10.15488/648 |
|
dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/672 |
|
dc.contributor.author |
Brödel, Johannes
|
|
dc.contributor.author |
Dixon, Lance J.
|
|
dc.date.accessioned |
2016-11-03T12:40:17Z |
|
dc.date.available |
2016-11-03T12:40:17Z |
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dc.date.issued |
2010 |
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dc.identifier.citation |
Brödel, Johannes; Dixon, L. J.: R 4 counterterm and E 7(7) symmetry in maximal supergravity. In: Journal of High Energy Physics 2010 (2010), Nr. 5, 003. DOI: http://dx.doi.org/10.1007/JHEP05(2010)003 |
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dc.description.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 continuous coset symmetry E 7(7)/SU(8) , exploring the limits as a single scalar becomes soft, as well as a double-soft scalar limit relation derived recently by Arkani-Hamed et al. We implement these relations for the matrix elements of the R 4 term that 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, including certain non-maximally-helicity- violating six-point amplitudes. However, the single-soft limit does not vanish for this latter set of amplitudes, which suggests that the E 7(7) symmetry is broken by the R 4 term. |
eng |
dc.description.sponsorship |
U.S. Department of Energy/DE-AC02-76SF00515 |
|
dc.description.sponsorship |
German-Israeli Project cooperation (DIP) |
|
dc.description.sponsorship |
German-Israeli Foundation (GIF) |
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dc.language.iso |
eng |
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dc.publisher |
Heidelberg : Springer Verlag |
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dc.relation.ispartofseries |
Journal of High Energy Physics 2010 (2010), Nr. 5 |
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dc.rights |
CC BY 4.0 Unported |
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dc.rights.uri |
http://creativecommons.org/licenses/by/4.0/ |
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dc.subject |
Extended supersymmetry |
eng |
dc.subject |
Supergravity models |
eng |
dc.subject.ddc |
500 | Naturwissenschaften
|
ger |
dc.subject.ddc |
530 | Physik
|
ger |
dc.title |
R 4 counterterm and E 7(7) symmetry in maximal supergravity |
|
dc.type |
Article |
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dc.type |
Text |
|
dc.relation.essn |
1029-8479 |
|
dc.relation.issn |
1126-6708 |
|
dc.relation.doi |
http://dx.doi.org/10.1007/JHEP05(2010)003 |
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dc.bibliographicCitation.issue |
5 |
|
dc.bibliographicCitation.volume |
2010 |
|
dc.bibliographicCitation.firstPage |
003 |
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dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
|