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Vacuum instabilities in the N2HDM

2019-09-02Journal article Open access
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dc.contributor.authorFerreira, P. M.
dc.contributor.authorSantos, Rui
dc.contributor.authorMuehlleitner, Milada Margarete
dc.contributor.authorWeiglein, Georg
dc.contributor.authorWittbrodt, Jonas
dc.date.accessioned2019-10-04T09:20:27Z
dc.date.available2019-10-04T09:20:27Z
dc.date.issued2019-09-02
dc.description.abstractThe Higgs sector of the Next-to-Minimal Two-Higgs-Doublet Model (N2HDM) is obtained from the Two-Higgs-Doublet Model (2HDM) containing two complex Higgs doublets, by adding a real singlet field. In this paper, we analyse the vacuum structure of the N2HDM with respect to the possibility of vacuum instabilities. We show that while one type of charge-and CP-preserving vacuum cannot coexist with deeper charge or CP-breaking minima, there is another type of vacuum whose stability is endangered by the possible occurrence of deeper charge-and CP-breaking minima. Analytical expressions relating the depth of different vacua are deduced. Parameter scans of the model are carried out that illustrate the regions of parameter space where the vacuum is either stable or metastable as well as the regions where tunnelling to deeper vacua gives rise to a too short lifetime of the vacuum. Taking other experimental and theoretical constraints into account, we find that the vacuum stability constraints have an important impact on the phenomenology of the N2HDM.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationFERREIRA, P. M.; [et al] – Vacuum instabilities in the N2HDM. Journal of High Energy Physics. ISSN 1029-8479. Vol. 2019, N.º 9 (2019), pp. 1-31pt_PT
dc.identifier.doi10.1007/JHEP09(2019)006pt_PT
dc.identifier.issn1029-8479
dc.identifier.urihttp://hdl.handle.net/10400.21/10544
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relationCERN/FIS-PAR/0002/2017 - CERNpt_PT
dc.relationPTDC/FIS-PAR/31000/2017 - FCTpt_PT
dc.relationUMO-2015/18/M/ST2/00518 - NSC, Polandpt_PT
dc.relation396021762 - TRR 257 - Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)pt_PT
dc.relationEXC 2121 - Deutsche Forschungsgemeinschaft under Germany's Excellence Strategypt_PT
dc.relationUID/FIS/00618/2019 - CFTC-ULpt_PT
dc.relation.publisherversionhttps://link.springer.com/content/pdf/10.1007%2FJHEP09%282019%29006.pdfpt_PT
dc.subjectBeyond Standard Modelpt_PT
dc.subjectHiggs Physicspt_PT
dc.titleVacuum instabilities in the N2HDMpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage31pt_PT
oaire.citation.issue9pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleJournal of High Energy Physicspt_PT
oaire.citation.volume2019
person.familyNameSantos
person.familyNameMuhlleitner
person.familyNameWittbrodt
person.givenNameRui
person.givenNameMilada Margarete
person.givenNameJonas
person.identifier100360
person.identifier.ciencia-id5A1A-5794-6DC2
person.identifier.ciencia-id131D-3C62-1A57
person.identifier.ciencia-id141D-934B-A074
person.identifier.orcid0000-0002-7948-0355
person.identifier.orcid0000-0003-3922-0281
person.identifier.orcid0000-0002-2715-8671
person.identifier.ridF-1956-2010
person.identifier.scopus-author-id10739338800
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationf972a9bd-1bdd-4a47-8d1e-94e9595eddc0
relation.isAuthorOfPublicationcd7b311d-6dc4-4624-b156-d8dec59488e3
relation.isAuthorOfPublication969daddf-6349-4190-ad86-18f85143c473
relation.isAuthorOfPublication.latestForDiscoveryf972a9bd-1bdd-4a47-8d1e-94e9595eddc0

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