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Singlet extensions of the standard model at LHC Run 2: benchmarks and comparison with the NMSSM

2016-06Journal article Restricted access
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dc.contributor.authorCosta, Raul
dc.contributor.authorMuhlleitner, Margarete
dc.contributor.authorSampaio, Marco O. P.
dc.contributor.authorSantos, Rui
dc.date.accessioned2017-07-24T14:33:34Z
dc.date.available2017-07-24T14:33:34Z
dc.date.issued2016-06
dc.description.abstractThe Complex singlet extension of the Standard Model (CxSM) is the simplest extension that provides scenarios for Higgs pair production with different masses. The model has two interesting phases: the dark matter phase, with a Standard Model-like Higgs boson, a new scalar and a dark matter candidate; and the broken phase, with all three neutral scalars mixing. In the latter phase Higgs decays into a pair of two different Higgs bosons are possible. In this study we analyse Higgs-to-Higgs decays in the framework of singlet extensions of the Standard Model (SM), with focus on the CxSM. After demonstrating that scenarios with large rates for such chain decays are possible we perform a comparison between the NMSSM and the CxSM. We find that, based on Higgs-to-Higgs decays, the only possibility to distinguish the two models at the LHC run 2 is through final states with two different scalars. This conclusion builds a strong case for searches for final states with two different scalars at the LHC run 2. Finally, we propose a set of benchmark points for the real and complex singlet extensions to be tested at the LHC run 2. They have been chosen such that the discovery prospects of the involved scalars are maximised and they fulfil the dark matter constraints. Furthermore, for some of the points the theory is stable up to high energy scales. For the computation of the decay widths and branching ratios we developed the Fortran codept_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCOSTA, Raul [et al] - Singlet extensions of the standard model at LHC Run 2: benchmarks and comparison with the NMSSM. Journal of High Energy Physics. ISSN 1029-8479. N.º 7 (2016), pp.1-52pt_PT
dc.identifier.doi10.1007/JHEP06(2016)034pt_PT
dc.identifier.issn1029-8479
dc.identifier.urihttp://hdl.handle.net/10400.21/7302
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relation.publisherversionhttps://link.springer.com/content/pdf/10.1007%2FJHEP06%282016%29034.pdfpt_PT
dc.subjectBeyond Standard Modelpt_PT
dc.subjectHiggs Physicspt_PT
dc.titleSinglet extensions of the standard model at LHC Run 2: benchmarks and comparison with the NMSSMpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage52pt_PT
oaire.citation.issue7pt_PT
oaire.citation.startPage1pt_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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