Stringent limits on top-quark compositeness from t(t)over-bar production at the Tevatron and the LHC

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dc.contributor.authorFabbrichesi, M.
dc.contributor.authorPinamonti, M.
dc.contributor.authorTonero, A. [UNESP]
dc.contributor.institutionINFN
dc.contributor.institutionSISSA
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-12-03T13:11:19Z
dc.date.available2014-12-03T13:11:19Z
dc.date.issued2014-04-11
dc.description.abstractIf the top quark is a composite state made out of some constituents, then its interaction with the gluon will be modified. We introduce the leading effective operators that contribute to the radius and anomalous magnetic moment of the top quark and study their effect on the cross section for t (t) over bar production at the Tevatron and the LHC. Current measurements of the cross sections set a stringent limit on the scale of compositeness. This limit is comparable to similar limits obtained for light quarks and those from electroweak precision measurements. It can be used to constrain the parameter space of some composite Higgs models.en
dc.description.affiliationINFN, Sez Trieste, I-34136 Trieste, Italy
dc.description.affiliationINFN, Sez Trieste, Grp Collegato Udine, I-34136 Trieste, Italy
dc.description.affiliationSISSA, I-34136 Trieste, Italy
dc.description.affiliationUniv Estadual Paulista, ICTP South Amer Inst Fundamental Res, BR-01140070 Sao Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, ICTP South Amer Inst Fundamental Res, BR-01140070 Sao Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 11/11973-4
dc.description.sponsorshipIdFAPESP: 13/02404-1
dc.format.extent14
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.89.074028
dc.identifier.citationPhysical Review D. College Pk: Amer Physical Soc, v. 89, n. 7, 14 p., 2014.
dc.identifier.doi10.1103/PhysRevD.89.074028
dc.identifier.fileWOS000334318200007.pdf
dc.identifier.issn1550-7998
dc.identifier.urihttp://hdl.handle.net/11449/113018
dc.identifier.wosWOS:000334318200007
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review D
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleStringent limits on top-quark compositeness from t(t)over-bar production at the Tevatron and the LHCen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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