Helicity selection rules and noninterference for BSM amplitudes

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dc.contributor.authorAzatov, Aleksandr
dc.contributor.authorContino, Roberto
dc.contributor.authorMachado, Camila S. [UNESP]
dc.contributor.authorRiva, Francesco
dc.contributor.institutionAbdus Salam Int Ctr Theoret Phys
dc.contributor.institutionEcole Polytech Fed Lausanne
dc.contributor.institutionCERN
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-11-26T17:32:59Z
dc.date.available2018-11-26T17:32:59Z
dc.date.issued2017-03-20
dc.description.abstractPrecision studies of scattering processes at colliders provide powerful indirect constraints on new physics. We study the helicity structure of scattering amplitudes in the standard model (SM) and in the context of an effective Lagrangian description of beyond-the-SM (BSM) dynamics. Our analysis reveals a novel set of helicity selection rules according to which, in the majority of 2 -> 2 scattering processes at high energy, the SM and the leading BSM effects do not interfere. In such situations, the naive expectation that dimension-6 operators represent the leading BSM contribution is compromised, as corrections fromdimension-8 operators can become equally (if not more) important well within the validity of the effective field theory approach.en
dc.description.affiliationAbdus Salam Int Ctr Theoret Phys, Str Costiera 11, I-34151 Trieste, Italy
dc.description.affiliationEcole Polytech Fed Lausanne, Inst Theorie Phenomenes Phys, CH-1015 Lausanne, Switzerland
dc.description.affiliationCERN, Theoret Phys Dept, CH-1211 Geneva, Switzerland
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01049010 Sao Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01049010 Sao Paulo, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipERC Advanced Grant Electroweak symmetry breaking, flavor and dark matter: One solution for three mysteries (DaMeSyFla)
dc.description.sponsorshipIdFAPESP: 2012/21627-9
dc.description.sponsorshipIdERC Advanced Grant Electroweak symmetry breaking, flavor and dark matter: One solution for three mysteries (DaMeSyFla): 267985
dc.format.extent11
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.95.065014
dc.identifier.citationPhysical Review D. College Pk: Amer Physical Soc, v. 95, n. 6, 11 p., 2017.
dc.identifier.doi10.1103/PhysRevD.95.065014
dc.identifier.fileWOS000401911300004.pdf
dc.identifier.issn2470-0010
dc.identifier.urihttp://hdl.handle.net/11449/162825
dc.identifier.wosWOS:000401911300004
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review D
dc.relation.ispartofsjr1,801
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.titleHelicity selection rules and noninterference for BSM amplitudesen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
unesp.author.orcid0000-0002-1031-6565[2]

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