I. S. Guinn
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View article: LEGEND: 0νββ decay search with germanium detectors
LEGEND: 0νββ decay search with germanium detectors Open
Parallel talk presented at the XXI International Workshop on Neutrino Telescopes - Padova 29 September - 3 October 2025 (https://agenda.infn.it/event/44606/) On behalf of the LEGEND Collaboration Abstract: The LEGEND experiment searches fo…
View article: Final Results of the Majorana Demonstrator’s Search for Double-Beta Decay of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Ge</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>76</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> to Excited States of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Se</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>76</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>
Final Results of the Majorana Demonstrator’s Search for Double-Beta Decay of to Excited States of Open
Ge
View article: The MAJORANA DEMONSTRATOR experiment's construction, commissioning, and performance
The MAJORANA DEMONSTRATOR experiment's construction, commissioning, and performance Open
Background: The MAJORANA DEMONSTRATOR , a modular array of isotopically enriched high-purity germanium (HPGe) detectors, was constructed to demonstrate backgrounds low enough to justify building a tonne-scale experiment to search for the n…
View article: Assay-based background projection for the Majorana Demonstrator using Monte Carlo uncertainty propagation
Assay-based background projection for the Majorana Demonstrator using Monte Carlo uncertainty propagation Open
The background index (BI) is an important quantity to project and calculate the half-life sensitivity of neutrinoless double-β decay (0νββ) experiments. An analysis framework is presented to calculate the BI using the specific activities, …
View article: An assay-based background projection for the MAJORANA DEMONSTRATOR using Monte Carlo Uncertainty Propagation
An assay-based background projection for the MAJORANA DEMONSTRATOR using Monte Carlo Uncertainty Propagation Open
The background index is an important quantity which is used in projecting and calculating the half-life sensitivity of neutrinoless double-beta decay ($0νββ$) experiments. A novel analysis framework is presented to calculate the background…
View article: Interpretable boosted-decision-tree analysis for the Majorana Demonstrator
Interpretable boosted-decision-tree analysis for the Majorana Demonstrator Open
The Majorana Demonstrator is a leading experiment searching for neutrinoless double-beta decay with high purity germanium (HPGe) detectors. Machine learning provides a new way to maximize the amount of information provided by these detecto…
View article: Exotic Dark Matter Search with the Majorana Demonstrator
Exotic Dark Matter Search with the Majorana Demonstrator Open
With excellent energy resolution and ultralow-level radiogenic backgrounds, the high-purity germanium detectors in the MAJORANA DEMONSTRATOR enable searches for several classes of exotic dark matter (DM) models. In this work, we report new…
View article: Final Result of the Majorana Demonstrator's Search for Neutrinoless Double-𝛽 Decay in Ge76
Final Result of the Majorana Demonstrator's Search for Neutrinoless Double-𝛽 Decay in Ge76 Open
The MAJORANA DEMONSTRATOR searched for neutrinoless double-β decay (0νββ) of 76Ge using modular arrays of high-purity Ge detectors operated in vacuum cryostats in a low-background shield. The arrays operated with up to 40.4 kg of detectors…
View article: Exotic Dark Matter Search with the Majorana Demonstrator
Exotic Dark Matter Search with the Majorana Demonstrator Open
With excellent energy resolution and ultralow-level radiogenic backgrounds, the high-purity germanium detectors in the enable searches for several classes of exotic dark matter (DM) models. In this work, we report new experimental limits o…
View article: Constraints on the Decay of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Ta</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>180</mml:mn><mml:mi>m</mml:mi></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>
Constraints on the Decay of Open
^{180m}Ta is a rare nuclear isomer whose decay has never been observed. Its remarkably long lifetime surpasses the half-lives of all other known β and electron capture decays due to the large K-spin differences and small energy differences…
View article: Energy calibration of germanium detectors for the Majorana Demonstrator
Energy calibration of germanium detectors for the Majorana Demonstrator Open
The Majorana Demonstrator was a search for neutrinoless double-beta decay (0 νββ ) in the 76 Ge isotope. It was staged at the 4850-foot level of the Sanford Underground Research Facility (SURF) in Lead, SD. The experiment consisted of 58 g…
View article: Erratum: Search for Spontaneous Radiation from Wave Function Collapse in the Majorana Demonstrator [Phys. Rev. Lett. <b>129</b>, 080401 (2022)]
Erratum: Search for Spontaneous Radiation from Wave Function Collapse in the Majorana Demonstrator [Phys. Rev. Lett. <b>129</b>, 080401 (2022)] Open
This corrects the article DOI: 10.1103/PhysRevLett.129.080401.
View article: Charge trapping correction and energy performance of the Majorana Demonstrator
Charge trapping correction and energy performance of the Majorana Demonstrator Open
P-type point contact (PPC) high-purity germanium detectors are an important technology in astroparticle and nuclear physics due to their superb energy resolution, low noise, and pulse shape discrimination capabilities. Analysis of data fro…
View article: α -event characterization and rejection in point-contact HPGe detectors
α -event characterization and rejection in point-contact HPGe detectors Open
View article: Final Result of the Majorana Demonstrator’s Search for Neutrinoless Double-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math> Decay in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Ge</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>76</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>
Final Result of the Majorana Demonstrator’s Search for Neutrinoless Double- Decay in Open
The Majorana Demonstrator searched for neutrinoless double-β decay (0νββ) of ^{76}Ge using modular arrays of high-purity Ge detectors operated in vacuum cryostats in a low-background shield. The arrays operated with up to 40.4 kg of detect…
View article: Interpretable boosted-decision-tree analysis for the Majorana Demonstrator
Interpretable boosted-decision-tree analysis for the Majorana Demonstrator Open
The MAJORANA DEMONSTRATOR is a leading experiment searching for neutrinoless double-beta decay with high purity germanium (HPGe) detectors. Machine learning provides a new way to maximize the amount of information provided by these detecto…
View article: Search for Solar Axions via Axion-Photon Coupling with the Majorana Demonstrator
Search for Solar Axions via Axion-Photon Coupling with the Majorana Demonstrator Open
Axions were originally proposed to explain the strong-CP problem in QCD. Through axion-photon coupling, the Sun could be a major source of axions, which could be measured in solid state detection experiments with enhancements due to cohere…
View article: Experimental study of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">C</mml:mi><mml:mprescripts/><mml:none/><mml:mn>13</mml:mn></mml:mmultiscripts><mml:mo>(</mml:mo><mml:mi>α</mml:mi><mml:mo>,</mml:mo><mml:mi>n</mml:mi><mml:mo>)</mml:mo><mml:mmultiscripts><mml:mi mathvariant="normal">O</mml:mi><mml:mprescripts/><mml:none/><mml:mn>16</mml:mn></mml:mmultiscripts></mml:mrow></mml:math> reactions in the Majorana Demonstrator calibration data
Experimental study of reactions in the Majorana Demonstrator calibration data Open
Neutron captures and delayed decays of reaction products are common sources of backgrounds in ultrarare event searches. In this work, we studied 13C(α,n)16O reactions induced by α particles emitted within the calibration sources of the Maj…
View article: $$\alpha $$-event characterization and rejection in point-contact HPGe detectors
$$\alpha $$-event characterization and rejection in point-contact HPGe detectors Open
View article: Signatures of muonic activation in the Majorana Demonstrator
Signatures of muonic activation in the Majorana Demonstrator Open
Experiments searching for very rare processes such as neutrinoless double-beta decay require a detailed understanding of all sources of background. Signals from radioactive impurities present in construction and detector materials can be s…
View article: Search for double-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math> decay of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ge</mml:mi><mml:mprescripts/><mml:none/><mml:mn>76</mml:mn></mml:mmultiscripts></mml:math> to excited states of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Se</mml:mi><mml:mprescripts/><mml:none/><mml:mn>76</mml:mn></mml:mmultiscripts></mml:math> with the majorana demonstrator
Search for double- decay of to excited states of with the majorana demonstrator Open
The Majorana Demonstrator is a neutrinoless double-beta decay search\nconsisting of a low-background modular array of high-purity germanium\ndetectors, $\\sim2/3$ of which are enriched to 88\\% in $^{76}$Ge. The experiment\nis also searchi…
View article: ADC Nonlinearity Correction for the Majorana Demonstrator
ADC Nonlinearity Correction for the Majorana Demonstrator Open
Imperfections in analog-to-digital conversion cannot be ignored when signal digitization requirements demand both wide dynamic range and high resolution, as is the case for the MAJORANA DEMONSTRATOR 76Ge neutrinoless double beta…
View article: The Search for Double-Beta Decay to Excited States in $^{76}$Ge using the MAJORANA DEMONSTRATOR
The Search for Double-Beta Decay to Excited States in $^{76}$Ge using the MAJORANA DEMONSTRATOR Open
The discovery of neutrino mass is the first tangible contradiction of the Standard Model of particle physics. Two neutrino double-beta decay (2νββ) is an allowed second order process in the Standard Model that has been observed with half-l…
View article: Design improvements to cables and connectors in the Majorana Demonstrator
Design improvements to cables and connectors in the Majorana Demonstrator Open
The MAJORANA DEMONSTRATOR is an experiment constructed to search for neutrinoless double-beta decays in germanium-76 and to demonstrate the feasibility to deploy a ton-scale experiment in a phased and modular fashion. It consists of two mo…
View article: Progress Toward A 2νββ Measurement For The Majorana Demonstrator
Progress Toward A 2νββ Measurement For The Majorana Demonstrator Open
The MAJORANA DEMONSTRATOR is a 76 Ge-based neutrinoless double-beta decay (0 νββ ) experiment. Staged at the 4850 ft level of the Sanford Underground Research Facility, the DEMONSTRATOR operates an array of high-purity p-type point contact…
View article: Data quality assurance for the Majorana Demonstrator
Data quality assurance for the Majorana Demonstrator Open
The MAJORANA DEMONSTRATOR is an experiment constructed to search for neutrinoless double-beta decays in germanium-76 and to demonstrate the feasibility to deploy a large-scale experiment in a phased and modular fashion. It consists of two …
View article: Initial results from the Majorana Demonstrator
Initial results from the Majorana Demonstrator Open
The Majorana Collaboration has assembled an array of high purity Ge detectors to search for neutrinoless double-beta decay in 76 Ge with the goal of establishing the required background and scalability of a Ge-based next-generation ton-sca…
View article: Spectral analysis for the Majorana Demonstrator experiment
Spectral analysis for the Majorana Demonstrator experiment Open
The MAJORANA DEMONSTRATOR is an experiment constructed to search for neutrinoless double-beta decays in germanium-76 and to demonstrate the feasibility to deploy a ton-scale experiment in a phased and modular fashion. It consists of two mo…
View article: Current status of LEGEND: Searching for Neutrinoless Double-Beta Decay in 76Ge: Part II
Current status of LEGEND: Searching for Neutrinoless Double-Beta Decay in 76Ge: Part II Open
Neutrinoless double-beta decay (0$νββ$) decay is a hypothetical process that violates lepton number, and whose observation would unambiguously indicate that neutrinos are Majorana fermions. In the standard inverted-ordering neutrino mass s…
View article: Current Status of LEGEND: Searching for Neutrinoless Double-Beta Decay in $^{76}$Ge
Current Status of LEGEND: Searching for Neutrinoless Double-Beta Decay in $^{76}$Ge Open
Neutrinoless double-beta decay($0\nu\beta\beta$) decay is a hypothetical process that violates lepton number, and whose observation would unambiguously indicate that neutrinos are Majorana fermions. In the standard inverted-ordering neutri…