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Double-soft behavior of the dilaton of spontaneously broken conformal invariance
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). University of Copenhagen, Denmark.
Number of Authors: 3
2017 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 9, 001Article in journal (Refereed) Published
Abstract [en]

The Ward identities involving the currents associated to the spontaneously broken scale and special conformal transformations are derived and used to determine, through linear order in the two soft-dilaton momenta, the double-soft behavior of scattering amplitudes involving two soft dilatons and any number of other particles. It turns out that the double-soft behavior is equivalent to performing two single-soft limits one after the other. We confirm the new double-soft theorem perturbatively at tree-level in a D-dimensional conformal field theory model, as well as nonperturbatively by using the gravity dual of N = 4 super Yang-Mills on the Coulomb branch; i.e. the Dirac-Born-Infeld action on AdS(5) x S-5.

Place, publisher, year, edition, pages
2017. no 9, 001
Keyword [en]
Space-Time Symmetries, Spontaneous Symmetry Breaking, Scattering Amplitudes, Conformal Field Models in String Theory
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-147919DOI: 10.1007/JHEP09(2017)001ISI: 000411020200001OAI: oai:DiVA.org:su-147919DiVA: diva2:1149832
Available from: 2017-10-17 Created: 2017-10-17 Last updated: 2017-10-17Bibliographically approved

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Di Vecchia, Paolo
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