Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 163 for “"Neutrinos"”.
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Oscillations and Sterile Neutrinos
In this work I aim to introduce neutrino physics from its fairly mundane beginnings all the way up to the discovery of neutrino oscillations, the latest detectors and theoretical extensions to current models. When viewed individually, many of the detector methods and theories for oscillation seem …
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Collider phenomenology of heavy neutrinos
… work we investigate the signatures of such heavy neutrinos, having mass in the Electroweak scale at the high energy colliders. Based on a simple realization of inverse seesaw model we fix the model parameters to reproduce the neutrino oscillation data and to satisfy the other experimental …
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Sterile neutrinos in cold climates
… of new physics such as the existence of sterile neutrinos. This three-part thesis presents research directed towards understanding these anomalies and searching for sterile neutrino oscillations. Part I contains a theoretical discussion of neutrino coherence properties. The open-quantum-system …
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Constraining New Physics with Colliders and Neutrinos
In this work, we examine how neutrino and collider experiments can each and together put constraints on new physics more stringently than ever. Constraints arise in three ways. First, possible new theoretical frameworks are reviewed and analyzed for the compatibility with collider experiments. We …
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Phenomenological Consequences of Heavy Right Handed Neutrinos
… the see-saw mechanism where heavy right-handed neutrinos mix with the weak-basis states. The Majorana nature of the seesaw type neutrinos generates new 2-loop diagrams that lead to a non-vanishing lepton EDM. Only estimates of the resulting EDM have been done in the literature. A full …
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Search for NuMI muDAR Electron Neutrinos in MicroBooNE
<p>Muon Decay-at-Rest (μDAR) produces electron-neutrinos (νe) in the 0 to 53 MeV energy range. The given range is especially interesting for its similarity to Supernovae-produced νe. The Deep Underground Neutrino Experiment (DUNE) has as one of its main goals to measure Supernovae neutrinos on the …
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Testing the Leggett-Garg inequality with solar neutrinos
… outcomes. The flavor oscillations of solar neutrinos provide an interesting way to test the Leggett-Garg inequality, and on an astrophysical length scale. Beginning as electron neutrinos in the solar core, they undergo the Mikheyev-Smirnov-Wolfenstein Effect and exit the sun in either of two …
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Neutrinos as Windows Into Physics Beyond the Standard Model
We investigate several possible routes for extending the Standard Model of Particle Physics, based on phenomenological considerations. We focus particularly on the role of neutrino data, proton decay bounds and known fermion masses and mixing angles in constraining a viable model. First, we discuss …
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Detecting the invisible universe with neutrinos and dark matter
… matter: hot dark matter formed from cosmic relic neutrinos from the Big Bang, and directional detection of cold dark matter. The cosmic neutrino background is investigated through the KATRIN experiment, using neutrino capture on tritium to search for a signal. A sensitivity at KATRIN of about 10⁴ …
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Linear Sigma Models in QCD and S3 Symmetry for Neutrinos
… the masses and mixing matrix of three Majorana neutrinos. At zeroth order the model yielded degenerate neutrinos and a generalized "tribimaximal" mixing matrix. We first study the effects of the perturbation which violates S3 but preserves the well known (23) interchange symmetry. This is done …
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Searches for new physics at MiniBooNE : sterile neutrinos and mixing freedom
… of oscillation models with one or two sterile neutrinos is investigated in global fits to MiniBooNE and LSND data, with and without constraints from other oscillation experiments with similar sensitivities to those models. A general search for new physics scenarios which would lead to effective …
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Through Iron & Ice: Searching for Sterile Neutrinos at the IceCube Neutrino Observatory
… the rapid progression in our understanding of neutrinos over the last half century, much is left unknown about their properties. This leaves neutrinos as the most promising portal for Beyond Standard Model (BSM) physics, and neutrinos have already provided fruitful surprises. A number of …
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The Role of Baryons and Neutrinos in the Evolution of Large-Scale Structure
… the effect of the cosmic background of massive neutrinos. As these remain relativistic to relatively late times, they will free-stream out of overdensities, altering the formation of large-scale structure (LSS). If this effect can be accurately modelled, it presents an independent method of …
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Applications of Low Temperature Bolometers to Reactor Neutrinos and Neutrinoless Double Beta Decay
… moment and non-standard interactions between neutrinos and quarks. In particular, combining multiple detector materials and measuring CEvNS at a reactor places leading bounds on beyond the Standard Model neutrino-nucleon interactions. Limiting such interactions is crucial for upcoming beam …
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The Development of the SNO+ Experiment: Scintillator Timing, Pulse Shape Discrimination, and Sterile Neutrinos
… beta decay, and will measure low energy solar neutrinos. This thesis will describe three main development activities for the SNO+ experiment: the measurement of the timing parameters for the liquid scintillator cocktail, using those timing parameters to estimate the ability of SNO+ to …
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GALAXY-HALO CONNECTION AND CLUSTERING IN THE PRESENCE OF DYNAMICAL DARK ENERGY AND MASSIVE NEUTRINOS
… in the presence of dark energy and massive neutrinos, considering the datasets from the Sloan Digital Sky Survey (SDSS) for redshifts z < 0.2, and from the Cosmological Evolution Survey (COSMOS 2020) for 0.2 < z < 2. Implementing such a method, the author has populated with galaxies the dark …
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A Search for Muon Neutrinos from Gamma-Ray Bursts wih the IceCube 22-String Detector
Two searches are conducted for muon neutrinos from Gamma-Ray Bursts (GRBs) using the IceCube detector. Gamma-Ray Bursts are brief and transient emissions of keV/MeV radiation occuring with a rate of a few per day uniformly in the sky. Swift and other satellites of the Third Interplanetary Network …
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First Search for Gravitational Wave Coincident Neutrinos in a Liquid Argon Detector with DEAP-3600
… is no statistically significant evidence of neutrinos from any of the seven mergers examined. This allows for exclusion limits to be set on the electron neutrino fluence that reached the detector at 3.35×10^14 cm^−2 (7.24×10^11 cm^−2) for 10 MeV(100 MeV) electron neutrinos. Future LAr …
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X-ray searches for decaying sterile neutrinos with the Micro-X and XQC sounding rockets
The nature of dark matter is a major question in modern physics. Cosmological measurements have motivated the existence of matter beyond the standard model, but thus far there has not been a definitive observation of any particular candidate. One proposed particle is the sterile neutrino, a …
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Light, Unstable Sterile Neutrinos: Phenomenology, a Search in the IceCube Experiment, and a Global Picture
… thesis considers a model of unstable sterile neutrinos, where the heaviest mass state can decay. First, the phenomenology of unstable sterile neutrinos is explored in the IceCube experiment, a gigaton neutrino detector located at the South Pole. Second, global fits to traditional and unstable …
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