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Electroweak corrections to Higgs boson decays in a Complex Singlet extension of the SM and their phenomenological impact

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dc.contributor.authorEgle, F.
dc.contributor.authorMuehlleitner, M.
dc.contributor.authorSantos, Rui
dc.contributor.authorViana, J.
dc.date.accessioned2024-03-26T17:00:54Z
dc.date.available2024-03-26T17:00:54Z
dc.date.issued2023
dc.description.abstractThe complex singlet extension CxSM of the Standard Model (SM) is a simple extension of the SM with two visible Higgs bosons in the spectrum and a Dark Matter (DM) candidate. In this paper we complete the computation of the next-to-leading (NLO) electroweak (EW) corrections to on-shell and non-loop-induced Higgs decays. Our cal culations are implemented in the code EWsHDECAY which also includes the relevant QCD corrections. Performing an extensive parameter scan in the model and including all relevant theoretical and experimental single- and di-Higgs as well as DM constraints, we obtain a viable parameter sample. We fnd that current DM constraints are able to test the model in DM mass regions where collider searches are not sensitive. The relative EW corrections turn out to be large for scenarios with relatively large couplings, threshold efects or small leading-order (LO) widths. Otherwise, they are of typical EW size and can amount up to about 20–25%. The theory uncertainty derived from the change of the renormalization scheme dependence then is of a few per cent. While the NLO corrections applied in the constraints due to single- and di-Higgs searches impact the validity of specifc parameter points, the overall shape of the allowed parameter region is not yet sensitive to the EW corrections. This picture will change with further increased experimental precision in the future and necessitates precise predictions on the theory side as presented in this paper.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationEgle, F., Mühlleitner, M., Santos, R. et al. Electroweak corrections to Higgs boson decays in a Complex Singlet extension of the SM and their phenomenological impact. J. High Energ. Phys. 2023, 116 (2023). https://doi.org/10.1007/JHEP11(2023)116pt_PT
dc.identifier.doi10.1007/JHEP11(2023)116pt_PT
dc.identifier.issn1029-8479
dc.identifier.urihttp://hdl.handle.net/10400.21/17221
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relationCERN/FISPAR /0002/2017pt_PT
dc.relationCenter for Theoretical and Computational Physics
dc.relationCenter for Theoretical and Computational Physics
dc.relationFrom Higgs Phenomenology to the Unification of Fundamental Interactions
dc.relationStandard Model Extensions at the LHC
dc.relation.publisherversionhttps://link.springer.com/article/10.1007/JHEP11(2023)116pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectHiggs Propertiespt_PT
dc.subjectHigher Order Electroweak Calculationspt_PT
dc.titleElectroweak corrections to Higgs boson decays in a Complex Singlet extension of the SM and their phenomenological impactpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUIDB/00618/2020
oaire.awardNumberUIDP/00618/2020
oaire.awardNumberPTDC/FIS-PAR/31000/2017
oaire.awardNumberCERN/FIS-PAR/0014/2019
oaire.awardTitleCenter for Theoretical and Computational Physics
oaire.awardTitleCenter for Theoretical and Computational Physics
oaire.awardTitleFrom Higgs Phenomenology to the Unification of Fundamental Interactions
oaire.awardTitleStandard Model Extensions at the LHC
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00618%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00618%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FFIS-PAR%2F31000%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/CERN%2FFIS-PAR%2F0014%2F2019/PT
oaire.citation.endPage39pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleJournal of High Energy Physicspt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
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
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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