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The N2HDM under theoretical and experimental scrutiny

2017-03-17Journal article Restricted access
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dc.contributor.authorMühlleitner, Margarete
dc.contributor.authorSampaio, Marco
dc.contributor.authorSantos, Rui
dc.contributor.authorWittbrodt, Jonas
dc.date.accessioned2017-05-16T10:07:20Z
dc.date.available2017-05-16T10:07:20Z
dc.date.issued2017-03-17
dc.description.abstractThe N2HDM is based on the CP-conserving 2HDM extended by a real scalar singlet field. Its enlarged parameter space and its fewer symmetry conditions as compared to supersymmetric models allow for an interesting phenomenology compatible with current experimental constraints, while adding to the 2HDM sector the possibility of Higgs-to-Higgs decays with three different Higgs bosons. In this paper the N2HDM is subjected to detailed scrutiny. Regarding the theoretical constraints we implement tests of tree-level perturbativity and vacuum stability. Moreover, we present, for the first time, a thorough analysis of the global minimum of the N2HDM. The model and the theoretical constraints have been implemented in ScannerS, and we provide N2HDECAY, a code based on HDECAY, for the computation of the N2HDM branching ratios and total widths including the state-of-the-art higher order QCD corrections and off-shell decays. We then perform an extensive parameter scan in the N2HDM parameter space, with all theoretical and experimental constraints applied, and analyse its allowed regions. We find that large singlet admixtures are still compatible with the Higgs data and investigate which observables will allow to restrict the singlet nature most effectively in the next runs of the LHC. Similarly to the 2HDM, the N2HDM exhibits a wrong-sign parameter regime, which will be constrained by future Higgs precision measurements.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMÜHLLEITNER, Margarete; SAMPAIO, Marco O. P.; SANTOS, Rui; WITTBRODT, Jonas – The N2HDM under theoretical and experimental scrutiny. Journal of High Energy Physics. ISSN 1126-6708. N.º 3 (2017), pp. 1-41pt_PT
dc.identifier.doi10.1007/JHEP03(2017)094pt_PT
dc.identifier.issn1126-6708
dc.identifier.issn1029-8479
dc.identifier.urihttp://hdl.handle.net/10400.21/7009
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringer Verlagpt_PT
dc.relation.publisherversionhttp://download.springer.com/static/pdf/598/art%253A10.1007%252FJHEP03%25282017%2529094.pdf?originUrl=http%3A%2F%2Flink.springer.com%2Farticle%2F10.1007%2FJHEP03%282017%29094&token2=exp=1494929240~acl=%2Fstatic%2Fpdf%2F598%2Fart%25253A10.1007%25252FJHEP03%2525282017%252529094.pdf%3ForiginUrl%3Dhttp%253A%252F%252Flink.springer.com%252Farticle%252F10.1007%252FJHEP03%25282017%2529094*~hmac=7ab6b24eb79e5529481d2350aa2918ec7bb9e07d0c73564652e7d882f8fa21b6pt_PT
dc.subjectBeyond Standard Modelpt_PT
dc.subjectHiggs Physicspt_PT
dc.titleThe N2HDM under theoretical and experimental scrutinypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage41pt_PT
oaire.citation.issue3
oaire.citation.startPage1pt_PT
oaire.citation.titleJournal of High Energy Physicspt_PT
person.familyNameSampaio
person.familyNameSantos
person.familyNameWittbrodt
person.givenNameMarco
person.givenNameRui
person.givenNameJonas
person.identifier100360
person.identifier.ciencia-id5A1A-5794-6DC2
person.identifier.ciencia-id141D-934B-A074
person.identifier.orcid0000-0001-9493-2770
person.identifier.orcid0000-0002-7948-0355
person.identifier.orcid0000-0002-2715-8671
person.identifier.ridJ-2518-2013
person.identifier.ridF-1956-2010
person.identifier.scopus-author-id25650854600
person.identifier.scopus-author-id10739338800
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication139237aa-d59e-4966-b79b-4d6282a4f616
relation.isAuthorOfPublicationf972a9bd-1bdd-4a47-8d1e-94e9595eddc0
relation.isAuthorOfPublication969daddf-6349-4190-ad86-18f85143c473
relation.isAuthorOfPublication.latestForDiscovery969daddf-6349-4190-ad86-18f85143c473

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