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Cyclotron Radiation Emission Spectroscopy of Electrons from Tritium Beta Decay and Kr Internal Conversion
Project 8 Collaboration, A. Ashtari Esfahani, S. Böser +54
Project 8 has developed a novel technique, Cyclotron Radiation Emission Spectroscopy (CRES), for direct neutrino mass measurements. A CRES-based experiment on the beta spectrum of…
Shake-up and shake-off effects in neutrinoless double-beta decay
J. A. Detwiler, R. G. H. Robertson
We revisit the role of shake-up and shake-off effects in neutrinoless double-beta decay, following earlier work by Drukarev et al. We find in agreement with Drukarev et al. that th…
Search for keV-scale Sterile Neutrinos with first KATRIN Data
M. Aker, D. Batzler, A. Beglarian +128
In this work we present a keV-scale sterile-neutrino search with the first tritium data of the KATRIN experiment, acquired in the commissioning run in 2018. KATRIN performs a spect…
Search for Lorentz-Invariance Violation with the first KATRIN data
M. Aker, D. Batzler, A. Beglarian +130
Some extensions of the Standard Model of Particle Physics allow for Lorentz invariance and Charge-Parity-Time (CPT)-invariance violations. In the neutrino sector strong constraints…
The Project 8 Neutrino Mass Experiment
Project 8 Collaboration, A. Ashtari Esfahani, S. Böser +45
Measurements of the spectrum of tritium give the most precise direct limits on neutrino mass. Project 8 will investigate neutrino mass using Cyclotron Radiation Emission Spec…
KATRIN: Status and Prospects for the Neutrino Mass and Beyond
M. Aker, M. Balzer, D. Batzler +159
The Karlsruhe Tritium Neutrino (KATRIN) experiment is designed to measure a high-precision integral spectrum of the endpoint region of T2 beta decay, with the primary goal of probi…
New Constraint on the Local Relic Neutrino Background Overdensity with the First KATRIN Data Runs
M. Aker, D. Batzler, A. Beglarian +129
We report on the direct cosmic relic neutrino background search from the first two science runs of the KATRIN experiment in 2019. Beta-decay electrons from a high-purity molecular…
A Search for Electron Neutrino Transitions to Sterile States in the BEST Experiment
V. V. Barinov, B. T. Cleveland, S. N. Danshin +27
The Baksan Experiment on Sterile Transitions (BEST) probes the gallium anomaly and its possible connections to oscillations between active and sterile neutrinos. Based on the Galli…
Direct Measurements of Neutrino Mass
Joseph A. Formaggio, André Luiz C. de Gouvêa, R. G. Hamish Robertson
The turn of the 21st century witnessed a sudden shift in our fundamental understanding of particle physics. While the minimal Standard Model predicts that neutrino masses are exact…
Shakeup and shakeoff satellite structure in the electron spectrum of Kr
R. G. Hamish Robertson, Vedantha Venkatapathy
The isotope Kr, a 1.8-hr isomer of stable Kr, has become a standard for the calibration of tritium beta decay experiments to determine neutrino mass. It is also w…
Beta decay of molecular tritium
Y. -T. Lin, T. H. Burritt, C. Claessens +12
The beta decay of tritium in the form of molecular TT is the basis of sensitive experiments to measure neutrino mass. The final-state electronic, vibrational, and rotational excita…
Search for Zero-Neutrino Double Beta Decay in 76Ge with the Majorana Demonstrator
C. E. Aalseth, N. Abgrall, E. Aguayo +126
The \MJ\ Collaboration is operating an array of high purity Ge detectors to search for neutrinoless double-beta decay in Ge. The \MJ\ \DEM\ comprises 44.1~kg of Ge detectors…
New limits on Bosonic Dark Matter, Solar Axions, Pauli Exclusion Principle Violation, and Electron Decay from the Majorana Demonstrator
N. Abgrall, I. J. Arnquist, F. T. Avignone +64
We present new limits on exotic keV-scale physics based on 478 kg d of MAJORANA DEMONSTRATOR commissioning data. Constraints at the 90% confidence level are derived on bosonic dark…
Search for Pauli Exclusion Principle Violating Atomic Transitions and Electron Decay with a P-type Point Contact Germanium Detector
N. Abgrall, I. J. Arnquist, F. T. Avignone +66
A search for Pauli-exclusion-principle-violating K-alpha electron transitions was performed using 89.5 kg-d of data collected with a p-type point contact high-purity germanium dete…
Muon Flux Measurements at the Davis Campus of the Sanford Underground Research Facility with the Majorana Demonstrator Veto System
N. Abgrall, E. Aguayo, F. T. Avignone +71
We report the first measurement of the total MUON flux underground at the Davis Campus of the Sanford Underground Research Facility at the 4850 ft level. Measurements were done wit…
The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of 76Ge
Majorana Collaboration, W. Xu, N. Abgrall +63
Neutrinoless double-beta decay is a hypothesized process where in some even-even nuclei it might be possible for two neutrons to simultaneously decay into two protons and two elect…
A Dark Matter Search with MALBEK
G. K. Giovanetti, N. Abgrall, E. Aguayo +84
The MAJORANA DEMONSTRATOR is an array of natural and enriched high purity germanium detectors that will search for the neutrinoless double-beta decay of 76-Ge and perform a search…
Discovering the New Standard Model: Fundamental Symmetries and Neutrinos
V. Cianciolo, A. B. Balantekin, A. Bernstein +28
This White Paper describes recent progress and future opportunities in the area of fundamental symmetries and neutrinos.
The MAJORANA DEMONSTRATOR: Progress towards showing the feasibility of a tonne-scale 76Ge neutrinoless double-beta decay experiment
P. Finnerty, E. Aguayo, M. Amman +80
The MAJORANA DEMONSTRATOR will search for the neutrinoless double-beta decay of the 76Ge isotope with a mixed array of enriched and natural germanium detectors. The observation of…
Weak Interaction Studies with 6He
A. Knecht, Z. T. Alexander, Y. Bagdasarova +17
The 6He nucleus is an ideal candidate to study the weak interaction. To this end we have built a high-intensity source of 6He delivering ~10^10 atoms/s to experiments. Taking full…
The Majorana experiment: an ultra-low background search for neutrinoless double-beta decay
D. G. Phillips, E. Aguayo, F. T. Avignone +86
The observation of neutrinoless double-beta decay would resolve the Majorana nature of the neutrino and could provide information on the absolute scale of the neutrino mass. The in…
The Majorana Demonstrator
E. Aguayo, J. E. Fast, E. W. Hoppe +90
A brief review of the history and neutrino physics of double beta decay is given. A description of the MAJORANA DEMONSTRATOR research and development program including background r…
The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta Decay of Germanium-76
MAJORANA Collaboration, A. G. Schubert, E. Aguayo +90
The observation of neutrinoless double-beta decay would determine whether the neutrino is a Majorana particle and provide information on the absolute scale of neutrino mass. The MA…
Combined Analysis of all Three Phases of Solar Neutrino Data from the Sudbury Neutrino Observatory
SNO Collaboration, B. Aharmim, S. N. Ahmed +121
We report results from a combined analysis of solar neutrino data from all phases of the Sudbury Neutrino Observatory. By exploiting particle identification information obtained fr…