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dc.contributor.authorKarahan, Canan Nurhan
dc.contributor.authorKorutlu, Beste
dc.date.accessioned2017-05-05T08:20:05Z
dc.date.available2017-05-05T08:20:05Z
dc.date.issued2014-05
dc.identifier.citationKarahan, C.N., and Korutlu, B. (2014). Effects of a real singlet scalar on Veltman condition. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 732, 320-324. doi:10.1016/j.physletb.2014.03.063en_US
dc.identifier.issn0370-2693
dc.identifier.urihttps://doi.org/10.1016/j.physletb.2014.03.063
dc.identifier.urihttp://hdl.handle.net/11147/5452
dc.description.abstractWe revisit the fine-tuning problem in the Standard Model (SM) and show the modification in the Veltman condition by virtue of a minimally-extended particle spectrum with one real SM gauge singlet scalar field. We demand the new scalar to interact with the SM fields through Higgs portal only, and the new singlet to acquire a vacuum expectation value, resulting in a mixing with the CP-even neutral component of the Higgs doublet in the SM. The experimental bounds on the mixing angle are determined by the observed best-fit signal strength σ/σSM. While, the one-loop radiative corrections to the Higgs mass squared, computed with an ultraviolet cut-off scale Λ, come with a negative coefficient, the quantum corrections to the singlet mass squared acquire both positive and negative values depending on the parameter space chosen, which if positive might be eliminated by introducing singlet or doublet vector-like fermions. However, based upon the fact that there is mixing between the scalars, when transformed into the physical states, the tree-level coupling of the Higgs field to the vector-like fermions worsens the Higgs mass hierarchy problem. Therefore, the common attempt to introduce vector-like fermions to cancel the divergences in the new scalar mass might not be a solution, if there is mixing between the scalars.en_US
dc.description.sponsorshipTUBITAK (2232/113C002)en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.isversionof10.1016/j.physletb.2014.03.063en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectNaturalnessen_US
dc.subjectReal singlet scalaren_US
dc.subjectVector-like fermionsen_US
dc.subjectVeltman conditionen_US
dc.titleEffects of a real singlet scalar on Veltman conditionen_US
dc.typearticleen_US
dc.contributor.iztechauthorKarahan, Canan Nurhan
dc.contributor.iztechauthorKorutlu, Beste
dc.relation.journalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physicsen_US
dc.contributor.departmentİYTE, Fen Fakültesi, Fizik Bölümüen_US
dc.identifier.volume732en_US
dc.identifier.startpage320en_US
dc.identifier.endpage324en_US
dc.identifier.wosWOS:000335307900053
dc.identifier.scopusSCOPUS:2-s2.0-84898615386
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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