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Search for Fractionally Charged Particles with CUORE.
Phys Rev Lett
December 2024
Dipartimento di Fisica e Astronomia, Alma Mater Studiorum-Università di Bologna, Bologna I-40127, Italy.
The Cryogenic Underground Observatory for Rare Events (CUORE) is a detector array comprised by 988 5 cm×5 cm×5 cm TeO_{2} crystals held below 20 mK, primarily searching for neutrinoless double-beta decay in ^{130}Te. Unprecedented in size among cryogenic calorimetric experiments, CUORE provides a promising setting for the study of exotic throughgoing particles. Using the first tonne year of CUORE's exposure, we perform a search for hypothesized fractionally charged particles (FCPs), which are well-motivated by various standard model extensions and would have suppressed interactions with matter.
View Article and Find Full Text PDFSensitivity Challenge of the Next-Generation Bolometric Double-Beta Decay Experiment.
Research (Wash D C)
December 2024
Key Laboratory of Nuclear Physics and Ion-Beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China.
Cryogenic crystal bolometer plays a crucial role in searching for neutrinoless double-beta (0νββ) decay, which is a rare process that could determine the Majorana nature of neutrinos. The flagship bolometer experiment-CUORE (Cryogenic Underground Observatory for Rare Events)-operating at the Gran Sasso underground laboratory [Laboratori Nazionali del Gran Sasso (LNGS)] as the world's first ton-scale bolometric detector has achieved great success and well demonstrated advantages of the bolometric technology for the 0νββ study. The proposed upgrade of CUORE-the CUPID project-aims to achieve higher sensitivity with orders of magnitude background reduction by utilizing scintillating crystals and dual readout technology to exclude most of the background events dominated by alpha particles.
View Article and Find Full Text PDFFluorescence imaging of individual ions and molecules in pressurized noble gases for barium tagging in Xe.
Nat Commun
December 2024
Department of Physics, University of Texas at Arlington, Arlington, TX, USA.
The imaging of individual Ba ions in high pressure xenon gas is one possible way to attain background-free sensitivity to neutrinoless double beta decay and hence establish the Majorana nature of the neutrino. In this paper we demonstrate selective single Ba ion imaging inside a high-pressure xenon gas environment. Ba ions chelated with molecular chemosensors are resolved at the gas-solid interface using a diffraction-limited imaging system with scan area of 1 × 1 cm located inside 10 bar of xenon gas.
View Article and Find Full Text PDFSupramolecular chemistry in solution and solid-gas interfaces: synthesis and photophysical properties of monocolor and bicolor fluorescent sensors for barium tagging in neutrinoless double beta decay.
RSC Appl Interfaces
November 2024
Departamento de Química Orgánica I and Centro de Innovación y Química Avanzada (ORFEO-CINQA), Facultad de Química/Kimika Fakultatea, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU) 20018 Donostia-San Sebastián Spain
Translation of photophysical properties of fluorescent sensors from solution to solid-gas environments functionalized surfaces constitutes a challenge in chemistry. In this work, we report on the chemical synthesis, barium capture ability and photophysical properties of two families of monocolor and bicolor fluorescent sensors. These sensors were prepared to capture barium cations that can be produced in neutrinoless double beta decay of Xe-136.
View Article and Find Full Text PDFDemonstration of event position reconstruction based on diffusion in the NEXT-white detector.
Eur Phys J C Part Fields
May 2024
Department of Physics and Astronomy, Texas A &M University, College Station, TX 77843-4242 USA.
Noble element time projection chambers are a leading technology for rare event detection in physics, such as for dark matter and neutrinoless double beta decay searches. Time projection chambers typically assign event position in the drift direction using the relative timing of prompt scintillation and delayed charge collection signals, allowing for reconstruction of an absolute position in the drift direction. In this paper, alternate methods for assigning event drift distance via quantification of electron diffusion in a pure high pressure xenon gas time projection chamber are explored.
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