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Browsing by Author "Ohlsson, Tommy"

Browsing by Author "Ohlsson, Tommy"

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    Fits to non-supersymmetric SO(10) models with type I and II seesaw mechanisms using renormalization group evolution 
    Ohlsson, Tommy; Pernow, Marcus (Springer Science and Business Media LLC, 2019-06-18)
    We consider numerical fits to non-supersymmetric SO(10)-based models in which neutrino mass is generated by the type-I or type-II seesaw mechanism or a combination of both. The fits are performed with a sophisticated top-down procedure, taking into ...
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    A minimal non-supersymmetric SO(10) model with Peccei–Quinn symmetry 
    Boucenna, Sofiane M.; Ohlsson, Tommy; Pernow, Marcus (Elsevier BV, 2019-05)
    We present a minimal non-supersymmetric SO(10) GUT breaking directly to the Standard Model gauge group. Precise gauge coupling unification is achieved due to the presence of two color-octet scalars, one of which is accessible to LHC searches. Proton ...
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    Observational constraints on secret neutrino interactions from big bang nucleosynthesis 
    Huang, Guo-yuan; Ohlsson, Tommy; Zhou, Shun (American Physical Society (APS), 2018-04-05)
    We investigate possible interactions between neutrinos and massive scalar bosons via g ϕ ¯ ν ν ϕ (or massive vector bosons via g V ¯ ν γ μ ν V μ ) and explore the allowed parameter space of the coupling constant g ϕ (or g V ) ...
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    Running of fermion observables in non-supersymmetric SO(10) models 
    Ohlsson, Tommy; Pernow, Marcus (Springer Science and Business Media LLC, 2018-11-01)
    We investigate the complete renormalization group running of fermion observables in two different realistic non-supersymmetric models based on the gauge group SO(10) with intermediate symmetry breaking for both normal and inverted neutrino mass orderings. ...
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    Sensitivity to light sterile neutrinos at ESSnuSB 
    Ghosh, Monojit; Ohlsson, Tommy; Rosauro-Alcaraz, Salvador (Springer Science and Business Media LLC, 2020-03-01)
    We present a comprehensive analysis in the 3+1 active-sterile neutrino oscillation scenario for the sensitivity of the ESSnuSB experiment in the presence of light sterile neutrinos assuming both a far (FD) and a near (ND) detector. Our analysis show ...
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    Testing lepton flavor models at ESSnuSB 
    Blennow, Mattias; Ghosh, Monojit; Ohlsson, Tommy; Titov, Arsenii (Springer Science and Business Media LLC, 2020-07-01)
    We review and investigate lepton flavor models, stemming from discrete non- Abelian flavor symmetries, described by one or two free model parameters. First, we confront eleven one- and seven two-parameter models with current results on leptonic mixing ...
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    Threshold effects in SO(10) models with one intermediate breaking scale 
    Meloni, Davide; Ohlsson, Tommy; Pernow, Marcus (Springer Science and Business Media LLC, 2020-09-10)
    Despite the successes of the Standard Model of particle physics, it is known to suffer from a number of deficiencies. Several of these can be addressed within non-supersymmetric theories of grand unification based on SO(10). However, achieving gauge ...