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On the exactness of soft theorems

dc.contributor.authorGuerrieri, Andrea L. [UNESP]
dc.contributor.authorHuang, Yu-tin
dc.contributor.authorLi, Zhizhong
dc.contributor.authorWen, Congkao
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionChulalongkorn University
dc.contributor.institutionI.N.F.N. Sezione di Roma Tor Vergata
dc.contributor.institutionNational Taiwan University
dc.contributor.institutionNational Tsing-Hua University
dc.contributor.institutionCalifornia Institute of Technology
dc.contributor.institutionUCLA
dc.date.accessioned2018-12-11T17:16:58Z
dc.date.available2018-12-11T17:16:58Z
dc.date.issued2017-12-01
dc.description.abstractSoft behaviours of S-matrix for massless theories reflect the underlying symmetry principle that enforces its masslessness. As an expansion in soft momenta, sub-leading soft theorems can arise either due to (I) unique structure of the fundamental vertex or (II) presence of enhanced broken-symmetries. While the former is expected to be modified by infrared or ultraviolet divergences, the latter should remain exact to all orders in perturbation theory. Using current algebra, we clarify such distinction for spontaneously broken (super) Poincaré and (super) conformal symmetry. We compute the UV divergences of DBI, conformal DBI, and A-V theory to verify the exactness of type (II) soft theorems, while type (I) are shown to be broken and the soft-modifying higher-dimensional operators are identified. As further evidence for the exactness of type (II) soft theorems, we consider the α′ expansion of both super and bosonic open strings amplitudes, and verify the validity of the translation symmetry breaking soft-theorems up to O(α′6). Thus the massless S-matrix of string theory “knows” about the presence of D-branes.en
dc.description.affiliationICTP South American Institute for Fundamental Research IFT-UNESP, Rua Dr. Bento Teobaldo Ferraz 271, Bloco 2 — Barra Funda
dc.description.affiliationDepartment of Physics Faculty of Science Chulalongkorn University, 254 Phayathai Road, Thanon, Phayathai, Pathumwan
dc.description.affiliationI.N.F.N. Sezione di Roma Tor Vergata, Via della Ricerca Scientifica
dc.description.affiliationDepartment of Physics and Astronomy National Taiwan University, No. 1 Sec. 4 Roosevelt Road
dc.description.affiliationPhysics Division National Center for Theoretical Sciences National Tsing-Hua University, No. 101, section 2, Kuang-Fu Road
dc.description.affiliationWalter Burke Institute for Theoretical Physics California Institute of Technology, 1200 E California Blvd
dc.description.affiliationMani L. Bhaumik Institute for Theoretical Physics Department of Physics and Astronomy UCLA, 475 Portola Plaza
dc.description.affiliationUnespICTP South American Institute for Fundamental Research IFT-UNESP, Rua Dr. Bento Teobaldo Ferraz 271, Bloco 2 — Barra Funda
dc.identifierhttp://dx.doi.org/10.1007/JHEP12(2017)052
dc.identifier.citationJournal of High Energy Physics, v. 2017, n. 12, 2017.
dc.identifier.doi10.1007/JHEP12(2017)052
dc.identifier.file2-s2.0-85038591932.pdf
dc.identifier.issn1029-8479
dc.identifier.issn1126-6708
dc.identifier.scopus2-s2.0-85038591932
dc.identifier.urihttp://hdl.handle.net/11449/175664
dc.language.isoeng
dc.relation.ispartofJournal of High Energy Physics
dc.relation.ispartofsjr1,227
dc.relation.ispartofsjr1,227
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectEffective Field Theories
dc.subjectScattering Amplitudes
dc.subjectSpontaneous Symmetry Breaking
dc.titleOn the exactness of soft theoremsen
dc.typeArtigo
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Física Teórica (IFT), São Paulopt

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