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NLO electroweak corrections in general scalar singlet models

2017-07Journal article Restricted access
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dc.contributor.authorCosta, Raul
dc.contributor.authorSampaio, Marco O. P.
dc.contributor.authorSantos, Rui
dc.date.accessioned2017-09-26T14:47:52Z
dc.date.available2017-09-26T14:47:52Z
dc.date.issued2017-07
dc.description.abstractIf no new physics signals are found, in th.e coming years, at the Large Hadron Collider Run-2, an increase in precision of the Higgs couplings measurements will shift the discussion to the effects of higher order corrections. In Beyond the Standard Model (BSM) theories this may become the only tool to probe new physics. Extensions of the Standard Model (SM) with several scalar singlets may address several of its problems, namely to explain dark matter, the matter-antimatter asymmetry, or to improve the stability of the SM up to the Planck scale. In this work we propose a general framework to calculate one loop-corrections to the propagators and to the scalar field vacuum expectation values of BSM models with an arbitrary number of scalar singlets. We then apply our method to a real and to a complex scalar singlet models. We assess the importance of the one-loop radiative corrections first by computing them for a tree level mixing sum constraint, and then for the main Higgs production process gg --> H. We conclude that, for the currently allowed parameter space of these models, the corrections can be at most a few percent. Notably, a non-zero correction can survive when dark matter is present, in the SM-like limit of the Higgs couplings to other SM particles.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCOSTA, Raul; SAMPAIO, Marco O. P.; SANTOS, Rui. - NLO electroweak corrections in general scalar singlet models. Journal Of High Energy Physics. ISSN 1029-8479. N.º 7 (2017), pp. 1-35pt_PT
dc.identifier.doi10.1007/JHEP07(2017)081pt_PT
dc.identifier.issn1029-8479
dc.identifier.urihttp://hdl.handle.net/10400.21/7389
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relation.publisherversionhttps://arxiv.org/pdf/1704.02327.pdfpt_PT
dc.subjectBeyond Standard Modelpt_PT
dc.subjectHiggs Physicspt_PT
dc.subjectSpontaneous Symmetry Breakingpt_PT
dc.titleNLO electroweak corrections in general scalar singlet modelspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue7pt_PT
oaire.citation.titleJournal of High Energy Physicspt_PT
person.familyNameSantos
person.givenNameRui
person.identifier100360
person.identifier.ciencia-id5A1A-5794-6DC2
person.identifier.orcid0000-0002-7948-0355
person.identifier.ridF-1956-2010
person.identifier.scopus-author-id10739338800
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationf972a9bd-1bdd-4a47-8d1e-94e9595eddc0
relation.isAuthorOfPublication.latestForDiscoveryf972a9bd-1bdd-4a47-8d1e-94e9595eddc0

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