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dc.contributor.authorGrzadkowski, Bohdan
dc.contributor.authorHaber, Howard E.
dc.contributor.authorØgreid, Odd Magne
dc.contributor.authorOsland, Per
dc.date.accessioned2019-02-01T13:28:52Z
dc.date.available2019-02-01T13:28:52Z
dc.date.created2019-01-24T19:33:59Z
dc.date.issued2018
dc.identifier.citationGrzadkowski, B., Haber, H. E., Ogreid, O. M. & Osland, P. (2018). Heavy Higgs boson decays in the alignment limit of the 2HDM. Journal of High Energy Physics, 2018(12).nb_NO
dc.identifier.issn1029-8479
dc.identifier.urihttp://hdl.handle.net/11250/2583524
dc.description.abstractThe Standard Model (SM)-like couplings of the observed Higgs boson impose strong constraints on the structure of any extended Higgs sector. We consider the theoretical properties and the phenomenological implications of a generic two Higgs doublet model (2HDM). This model constitutes a simple and attractive extension of the SM that is consistent with the observation of the SM-like Higgs boson and precision electroweak observables, while providing a potential new source of CP-violation. In this paper we focus on the so-called Higgs alignment limit of the generic 2HDM, where the neutral scalar field H1, with the tree-level couplings of the SM Higgs boson, is a mass eigenstate that is aligned in field space with the direction of the Higgs vacuum expectation value. The properties of the two other heavier neutral Higgs scalars, H2 and H3, in the alignment limit of the 2HDM are also elucidated. It is shown that the couplings of H2 and H3 in the alignment limit are tightly constrained and correlated. For example, in the exact alignment limit at tree level, for bosonic final states BR(H2,3 → W+W−, ZZ, H1Z) = 0 and BR(H± → W±H1) = 0, whereas for fermionic final states Γ(H2 → ff¯)/Γ(H3 → ff¯) ∼ M2/M3 (where Mα is the mass of Hα). In some cases, the results of the alignment limit differ depending on whether or not alignment is achieved via the decoupling of heavy scalar states. In particular, in the exact alignment limit without decoupling BR(H2,3 → H1H1) = 0, whereas these branching ratios are nonzero in the decoupling regime. Observables that could be used to test the alignment scenario at the LHC are defined and discussed. The couplings of the Higgs bosons away from their exact alignment values are determined to leading order, and some consequences are elucidated.nb_NO
dc.language.isoengnb_NO
dc.publisherSpringernb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjectbeyond standard modelnb_NO
dc.subjectCP violationnb_NO
dc.subjectHiggs physicsnb_NO
dc.titleHeavy Higgs boson decays in the alignment limit of the 2HDMnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.rights.holder© The Authorsnb_NO
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431nb_NO
dc.source.pagenumber49nb_NO
dc.source.volume2018nb_NO
dc.source.journalJournal of High Energy Physics (JHEP)nb_NO
dc.source.issue12nb_NO
dc.identifier.doi10.1007/JHEP12(2018)056
dc.identifier.cristin1664764
cristin.unitcode203,12,4,0
cristin.unitnameInstitutt for data- og realfag
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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