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dc.contributor.authorBerkovits, Nathan
dc.date.accessioned2022-04-29T08:43:20Z
dc.date.available2022-04-29T08:43:20Z
dc.date.issued2007-05-24
dc.identifierhttp://dx.doi.org/10.1103/PhysRevLett.98.211601
dc.identifier.citationPhysical Review Letters, v. 98, n. 21, 2007.
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.urihttp://hdl.handle.net/11449/231041
dc.description.abstractThe nonminimal pure spinor formalism for the superstring is used to prove two new multiloop theorems which are related to recent higher-derivative R4 conjectures of Green, Russo, and Vanhove. The first theorem states that when 0<n<12, nR4 terms in the Type II effective action do not receive perturbative contributions above n/2 loops. The second theorem states that when n≤8, perturbative contributions to nR4 terms in the IIA and IIB effective actions coincide. As shown by Green, Russo, and Vanhove, these results suggest that d=4 N=8 supergravity is ultraviolet finite up to eight loops. © 2007 The American Physical Society.en
dc.language.isoeng
dc.relation.ispartofPhysical Review Letters
dc.sourceScopus
dc.titleNew higher-derivative R4 theorems for graviton scatteringen
dc.typeArtigo
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.description.affiliationInstituto de Física Teórica State University of São Paulo, Rua Pamplona 145, 01405-900, São Paulo, SP
dc.identifier.doi10.1103/PhysRevLett.98.211601
dc.identifier.scopus2-s2.0-34547319680
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