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Showing 1 to 20 of 53 for “"Neutrino mass"”.
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Techniques for direct neutrino mass measurement utilizing tritium [beta]-decay
… efforts performed in the service to two direct neutrino mass experiments, namely KATRIN at the Karlsruhe Institute of Technology in Karlsruhe, Germany and Project8 at the University of Washington in Seattle. These experiments aim to utilize a measurement of the shape of the endpoint of the …
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Modeling beta decay spectra to analyze the sensitivity of a neutrino mass experiment
… 8 experiment aims to measure the electron neutrino mass by obtaining and analyzing [beta] spectra from tritium decay. Using an inferential model of the experiment's anticipated data, I evaluate its projected sensitivity to certain parameters of interest. I focus on the precision and …
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An Optimized Bayesian Analysis Framework for the KATRIN Experiment
Neutrinos, which were originally predicted to be massless within the Standard Model of particle physics, have been confirmed to possess non-zero masses through the discovery of neutrino flavor oscillations. These oscillations precisely measure mass-squared splittings between neutrino mass …
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Collider phenomenology of heavy neutrinos
The existence of the neutrino mass has been established by the neutrino oscillation experiments. The so-called seesaw extension of the Standard Model is probably the simplest idea to naturally explain the existence of tiny neutrino mass through the lepton number violating Majorana mass term. There …
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Karlsruhe Tritium Experiment: Detector System Commissioning and In-Situ PIN-Diode Array Dead-Layer Measurement
… (KATRIN) experimental goal is to measure the neutrino mass to 0.2 eV sensitivity at the 90 percent confidence level. This is an order of magnitude more sensitive than the two most recent direct neutrino mass measurements. The primary sensitivity of the KATRIN experiment is determined by the …
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Neutrino masses and Baryogenesis via Leptogenesis in the Exceptional Supersymmetric Standard Model
Neutrino oscillation experiments discover that (left-handed) neutrinos have masses much less than charged leptons and quarks in the Standard Model. One solution to the light neutrino mass puzzle is the seesaw model where right-handed neutrinos are introduced with large Majorana masses. The heavy …
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The search for majoron emission in xenon-136 and two-neutrino double-beta decay of xenon-134 with the Enriched Xenon Observatory
Despite neutrino oscillation experiments firmly establishing neutrinos have non-zero mass, the absolute mass scale is unknown. Moreover, it's unknown whether the neutrino is distinguishable from its antiparticle. The most promising approach for measuring the neutrino mass scale and answering the …
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The HUNTER Experiment: A precision massive-neutrino search based on a laser-cooled atomic source
The HUNTER (Heavy Unseen Neutrinos from Total Energy-momentum Reconstruction) experiment bridges Atomic, Molecular, and Optical (AMO) physics with nuclear physics to search for a long-theorized particle. This elusive particle could provide key insights into the universe's mysteries, including dark …
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Observation of Electron Neutrino Appearance in the NuMI Beam with the NOvA Experiment
NOvA is a long-baseline neutrino oscillation experiment that uses two functionally identical detectors separated by 810 kilometers at locations 14 milliradians o -axis from the NuMI muon neutrino beam at Fermilab. At these locations the beam energy peaks at 2 GeV. This baseline is the longest in …
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Search for neutrinoless double-beta decay and 42Ar in enriched xenon using the EXO-200 dataset
Observation of neutrinoless double-beta decay (0νββ) would constitute discovery of a new class of particle (the Majorana neutrino), violate lepton number conservation, and provide a constraint on the neutrino mass scale. The Enriched Xenon Observatory experiment (EXO-200) operated an extremely …
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Attenuation of the scintillation light in liquid argon and investigation of the double beta decay of ⁷⁶Ge into excited states of ⁷⁶Se in the GERDA experiment
The GERDA experiment searches for the neutrinoless double beta (0𝜈𝛽𝛽) decay of Ge-76. The observation of this decay would prove the Majorana character of the neutrino, i.e. that it is its own antiparticle. This would clarify the question which neutrino mass ordering is realized in nature and give a …
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Tools for electromagnetic field simulation in the KATRIN experiment
The Karlsruhe Tritium Neutrino (KATRIN) experiment is a tritium beta decay experiment designed to make a direct, model independent measurement of the electron neutrino mass. To accomplish this task, the experiment employs precisely defined electric and magnetic fields for particle transport and …
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Measurement of the total electron-hydrogen scattering cross section for the Project 8 experiment
… 8 is an experiment that aims to determine the neutrino mass from a measurement of the endpoint of the tritium beta-decay continuous energy distribution. To do this, Project 8 is utilizing the cyclotron radiation of electrons in a magnetic field. In June 2014, Project 8 saw the first cyclotron …
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The Role of Baryons and Neutrinos in the Evolution of Large-Scale Structure
… is 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 …
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Doppler shifts in the KATRIN experiment
In the past few decades, neutrinos, which are predicted to be massless particles by the Standard Model of Particle Physics, have been shown to have non-zero mass. The absolute scale of this neutrino mass has significant implications in particle physics, astrophysics, and cosmology. The KATRIN …
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From atoms to astronomy : new approaches in neutrino physics
In this thesis I present research in neutrino physics utilizing tools from both atomic physics and astrophysics. Recent advances in atomic physics enable a new type of beta decay experiment to measure the absolute mass scale of the neutrino using a sample of ultracold atomic tritium. These initial …
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Statistical Signal Processing and Detector Optimization in Project 8
Despite the unambiguous discovery of non-zero neutrino masses from flavor oscillation experiments, a direct measurement of the absolute mass scale of the neutrino remains elusive to experimentalists. Project 8 is a tritium endpoint experiment utilizing Cyclotron Radiation Emission Spectroscopy …
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Optimization Studies for the COBRA Neutrinoless Double-Beta Decay Experiment and Results from a Prototype
… semiconductor detectors to search for the neutrinoless double-beta decay of cadmium-116. While the experiment has produced globally competitive half-life limits with data from coplanar-grid CZT detectors, a future ton-scale iteration could set limits constraining the effective Majorana …
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Lepton-Nucleus Constraints for Neutrino Interactions and Oscillations
Currently running and forthcoming precision neutrino oscillation experiments aim to unambiguously determine the neutrino mass ordering, the charge-parity violating phase in the lepton sector and the possible existence of physics Beyond the Standard Model. To have an understanding of all the effects …
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