Radiative neutrino masses: A window to new physics

Abstract

Neutrino oscillations constitute the first experimental confirmation of new physics, as they require a new piece that is absent in the Standard Model, non-zero neutrino masses. Questions such as how these masses are generated or why they are so small compared to other masses, are still under investigation. In this thesis, we study radiative neutrino mass models, a class of models where small neutrino masses are generated naturally, while the energy scale at which new physics appears is still low enough to be tested by current and future experiments, offering a falsifiable window to test beyond the Standard Model physics. In these models, neutrino masses are forbidden at the tree-level, but allowed at a certain order in loops. Consequently, we get masses suppressed by loop factors without requiring a large new physics scale and/or small couplings. In particular, we study the systematic classifications of the $d=7$ Majorana neutrino mass operator at one-loop order, the Weinberg operator at three-loop order and the $d=4$ Dirac neutrino mass models at the two-loop level. We then move to more specific models and mechanisms, analysing the connection between the generation of radiative neutrino masses and the stability of dark matter from a model-independent point of view, and examine a particular realisation of the type-I seesaw which relies on the radiative generation of Dirac Yukawa coupling. Finally, we analyse the phenomenology of some of the models discussed in the classifications, as well as a very particular case of neutrinoless double-$\beta$ decay where electrons are emitted with opposite chiralities along with a light scalar (Majoron).

Ph.D. Thesis, 309 pages, University repository ($\text{href}$)

References in corpus (51)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Observation of electron-antineutrino disappearance at Daya Bay
• Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam
• Double Beta Decay, Majorana Neutrinos, and Neutrino Mass
• Measurement of Neutrino Oscillation by the K2K Experiment
• Neutrino oscillations refitted
• SARAH 3.2: Dirac Gauginos, UFO output, and more
• From the trees to the forest: a review of radiative neutrino mass models
• Neutrino Masses and the LHC: Testing Type II Seesaw
• Neutrino mass, Dark Matter and Baryon Asymmetry via TeV-Scale Physics without Fine-Tuning
• Probing New Physics Models of Neutrinoless Double Beta Decay with SuperNEMO
• Search for heavy neutrinos and W bosons with right-handed couplings in proton-proton collisions at sqrt(s) = 8 TeV
• New Mechanism for Neutrino Mass Generation and Triply Charged Higgs Bosons at the LHC
• A Model of TeV Scale Physics for Neutrino Mass, Dark Matter and Baryon Asymmetry and its Phenomenology
• Pathways to Naturally Small Dirac Neutrino Masses
• Decaying warm dark matter and neutrino masses
• Gauging U(1) symmetries and the number of right-handed neutrinos
• Systematic classification of two-loop realizations of the Weinberg operator
• MEG Upgrade Proposal
• Radiative Neutrino Mass, Dark Matter and Leptogenesis
• Search for anomalous production of prompt same-sign lepton pairs and pair-produced doubly charged Higgs bosons with $\sqrt{s}=8$ TeV $pp$ collisions using the ATLAS detector
• Two-loop Dirac neutrino mass and WIMP dark matter
• TeV-scale Seesaw with Quintuplet Fermions
• New expectations and uncertainties on neutrinoless double beta decay
• A Three-Loop Model of Neutrino Mass with Dark Matter
• Probing Doubly Charged Higgs Bosons at the LHC through Photon Initiated Processes
• Gauge Trimming of Neutrino Masses
• A Model of Radiative Neutrino Mass: with or without Dark Matter
• Generalized Bottom-Tau unification, neutrino oscillations and dark matter: predictions from a lepton quarticity flavor approach
• Triviality and vacuum stability bounds in the three-loop neutrino mass model
• A Class of Three-Loop Models with Neutrino Mass and Dark Matter
• Testing Radiative Neutrino Mass Models at the LHC
• Recipes and Ingredients for Neutrino Mass at Loop Level
• Search for evidence of the type-III seesaw mechanism in multilepton final states in proton-proton collisions at sqrt(s) = 13 TeV
• A Three-Loop Neutrino Model with Global $U(1)$ Symmetry
• Common Origin of Neutrino Mass and Dark Matter from Anomaly Cancellation Requirements of a $U(1{)}_{B-L}$ Model
• A new B-L model without right-handed neutrinos
• Master Majorana neutrino mass parametrization
• Simplest Radiative Dirac Neutrino Mass Models
• Scotogenic $U(1{)}_{\chi }$ Dirac Neutrinos
• Neutrino Masses from Loop-induced $d\ge 7$ Operators
• Cascade Seesaw for Tiny Neutrino Mass
• A Colored KNT Neutrino Model
• Dark matter origins of neutrino masses
• A Three-loop Neutrino Mass Model with a Colored Triplet Scalar
• Neutrino mass with large $SU(2{)}_L$ multiplet fields
• Flavor Violating Transitions of Charged Leptons from a Seesaw Mechanism of Dimension Seven
• Loop-induced Neutrino Masses: A Case Study
• Radiative type-I seesaw neutrino masses
• Three-Loop Neutrino Mass Models at Colliders
• From dark matter to neutrinoless double beta decay