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Double-soft behavior of the dilaton of spontaneously broken conformal invariance
KTH, Centra, Nordic Institute for Theoretical Physics NORDITA. University of Copenhagen, Denmark.
2017 (Engelska)Ingår i: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 2017, nr 9, artikel-id 001Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
Springer, 2017. Vol. 2017, nr 9, artikel-id 001
Nyckelord [en]
Space-Time Symmetries, Spontaneous Symmetry Breaking, Scattering Amplitudes, Conformal Field Models in String Theory
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Identifikatorer
URN: urn:nbn:se:kth:diva-215383DOI: 10.1007/JHEP09(2017)001ISI: 000411020200001Scopus ID: 2-s2.0-85028908790OAI: oai:DiVA.org:kth-215383DiVA, id: diva2:1147931
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QC 20171009

Tillgänglig från: 2017-10-09 Skapad: 2017-10-09 Senast uppdaterad: 2017-10-09Bibliografiskt granskad

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Di Vecchia, Paolo
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