18 Result(s)
within
Tommy Ohlsson
Quantum Physics
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Article
Open AccessFlavor symmetries in an SU(5) model of grand unification
We investigate the options for imposing flavor symmetries on a minimal renormalizable non-supersymmetric SU(5) grand unified theory, without introducing additional flavor-related fields. Such symmetries reduce...
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Article
Open AccessFlavor symmetries in the Yukawa sector of non-supersymmetric SO(10): numerical fits using renormalization group running
We consider a class of SO(10) models with flavor symmetries in the Yukawa sector and investigate their viability by performing numerical fits to the fermion masses and mixing parameters. The fitting procedure ...
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Article
Open AccessExploring invisible neutrino decay at ESSnuSB
We explore invisible neutrino decay in which a heavy active neutrino state decays into a light sterile neutrino state and present a comparative analysis of two baseline options, 540 km and 360 km, for the ESSn...
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Open AccessTesting lepton flavor models at ESSnuSB
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 mode...
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Article
Open AccessSensitivity to light sterile neutrinos at ESSnuSB
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...
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Open AccessFits to non-supersymmetric SO(10) models with type I and II seesaw mechanisms using renormalization group evolution
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 sophis...
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Open AccessRunning of fermion observables in non-supersymmetric SO(10) models
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 bot...
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Open AccessFull parameter scan of the Zee model: exploring Higgs lepton flavor violation
We study the general Zee model, which includes an extra Higgs scalar doublet and a new singly-charged scalar singlet. Neutrino masses are generated at one-loop level, and in order to describe leptonic mixing, ...
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Article
Open AccessRenormalization group running of fermion observables in an extended non-supersymmetric SO(10) model
We investigate the renormalization group evolution of fermion masses, mixings and quartic scalar Higgs self-couplings in an extended non-supersymmetric SO(10) model, where the Higgs sector contains the 10 ...
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Article
Open AccessUnification of gauge couplings in radiative neutrino mass models
We investigate the possibility of gauge coupling unification in various radiative neutrino mass models, which generate neutrino masses at one- and/or two-loop level. Renormalization group running of gauge coup...
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Article
Open AccessA combined study of source, detector and matter non-standard neutrino interactions at DUNE
We simultaneously investigate source, detector and matter non-standard neutrino interactions at the proposed DUNE experiment. Our analysis is performed using a Markov Chain Monte Carlo exploring the full param...
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Article
Open AccessNeutrino physics with non-standard interactions at INO
Non-standard neutrino interactions (NSI) involved in neutrino propagation inside Earth matter could potentially alter atmospheric neutrino fluxes. In this work, we look at the impact of these NSI on the signal...
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Article
Open AccessExploring source and detector non-standard neutrino interactions at ESSνSB
We investigate source and detector non-standard neutrino interactions at the proposed ESSνSB experiment. We analyze the effect of non-standard physics at the probability level, the event-rate level and by a full ...
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Article
Open AccessEffects of intermediate scales on renormalization group running of fermion observables in an SO(10) model
In the context of non-supersymmetric SO(10) models, we analyze the renormalization group equations for the fermions (including neutrinos) from the GUT energy scale down to the electroweak energy scale, explici...
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Article
Open AccessConstraining sterile neutrinos using reactor neutrino experiments
Models of neutrino mixing involving one or more sterile neutrinos have resurrected their importance in the light of recent cosmological data. In this case, reactor antineutrino experiments offer an ideal place...
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Article
Constraining new physics with a positive or negative signal of neutrino-less double beta decay
We investigate numerically how accurately one could constrain the strengths of different short-range contributions to neutrino-less double beta decay in effective field theory. Depending on the outcome of near...
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Article
Renormalization group running of the neutrino mass operator in extra dimensions
We study the renormalization group (RG) running of the neutrino masses and the leptonic mixing parameters in two different extra-dimensional models, namely, the Universal Extra Dimensions (UED) model and a mod...
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Article
Non-standard interactions versus non-unitary lepton flavor mixing at a neutrino factory
The impact of heavy mediators on neutrino oscillations is typically described by non-standard four-fermion interactions (NSIs) or non-unitarity (NU). We focus on leptonic dimension-six effective operators whic...
