scholarly journals CUPID-0: a cryogenic calorimeter with particle identification for double beta decay search

2017 ◽  
Author(s):  
Fabio Bellini
Keyword(s):  
Beta Decay ◽  
Double Beta Decay ◽  
Particle Identification ◽  
Cryogenic Calorimeter

scholarly journals Bolometric Double Beta Decay Experiments: Review and Prospects

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2255
Author(s):  
Anastasiia Zolotarova
Keyword(s):  
Beta Decay ◽  
Region Of Interest ◽  
High Energy ◽  
New Physics ◽  
Double Beta Decay ◽  
Particle Identification ◽  
High Energy Resolution ◽  
Neutrino Masses ◽  
Inverted Hierarchy ◽  
Essential Information

This review aims to cover the history and recent developments on cryogenic bolometers for neutrinoless double beta decay (0ν2β) searches. A 0ν2β decay observation would confirm the total lepton charge non-conservation, which is related to a global U(1)LC symmetry. This discovery would also provide essential information on neutrino masses and nature, opening the door to new physics beyond the Standard Model. The bolometric technology shows good prospects for future ton-scale experiments that aim to fully investigate the inverted ordering region of neutrino masses. The big advantage of bolometers is the high energy resolution and the possibility of particle identification, as well as various methods of additional background rejection. The CUORE experiment has proved the feasibility of ton-scale cryogenic experiments, setting the most stringent limit on 130Te 0ν2β decay. Two CUPID demonstrators (CUPID-0 and CUPID-Mo) have set the most stringent limits on 82Se and 100Mo isotopes, respectively, with compatibly low exposures. Several experiments are developing new methods to improve the background in the region of interest with bolometric detectors. CUPID and AMoRE experiments aim to cover the inverted hierarchy region, using scintillating bolometers with hundreds of kg of 100Mo. We review all of these efforts here, with a focus on the different types of radioactive background and the measures put in place to mitigate them.

scholarly journals Result on the Neutrinoless Double Beta Decay Search of 82Se with the CUPID-0 Experiment

Universe ◽  
2018 ◽  
Vol 5 (1) ◽  
pp. 2
Author(s):  
Fabio Bellini ◽  
Oscar Azzolini ◽  
Maria Teresa Barrera ◽  
Jeffrey Beeman ◽  
Mattia Beretta ◽  
...  
Keyword(s):  
Beta Decay ◽  
Half Life ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Particle Identification ◽  
Large Array ◽  
Β Decay ◽  
Total Exposure ◽  
Stringent Limit ◽  
Α Particles

CUPID-0 is the first large array of scintillating Zn 82 Se cryogenic calorimeters (bolometers) implementing particle identification for the search of the neutrinoless double beta decay (0 ν β β ). The detector consists of 24 enriched Zn 82 Se bolometers for a total 82 Se mass of 5.28 kg and it has been taking data in the underground LNGS (Italy) since March 2017. In this article we show how the dual read-out provides a powerful tool for the α particles rejection. The simultaneous use of the heat and light information allows us to reduce the background down to (3.2 − 1.1 + 1.3 )×10 − 3 counts/(keV kg year), an unprecedented level for cryogenic calorimeters. In a total exposure of 5.46 kg year Zn 82 Se we set the most stringent limit on the 0 ν β β decay 82 Se half-life T 1 / 2 0 ν > 4.0 × 10 24 year at 90% C.I.

scholarly journals Low background techniques in bolometers for double-beta decay search

2017 ◽  
Vol 32 (30) ◽  
pp. 1743012 ◽  
Author(s):  
Denys Poda ◽  
Andrea Giuliani
Keyword(s):  
Beta Decay ◽  
Detection Efficiency ◽  
High Energy ◽  
Double Beta Decay ◽  
Particle Identification ◽  
Superior Performance ◽  
High Energy Resolution ◽  
Particle Detectors ◽  
Low Background ◽  
Bolometric Detectors

Bolometers are low temperature particle detectors with high energy resolution and detection efficiency. Some types of bolometric detectors are also able to perform an efficient particle identification. A wide variety of radiopure dielectric and diamagnetic materials makes the bolometric technique favorable for applications in astroparticle physics. In particular, thanks to their superior performance, bolometers play an important role in the worldwide efforts on searches for neutrinoless double-beta decay. Such experiments strongly require an extremely low level of the backgrounds that can easily mimic the process searched for. Here, we overview recent progress in the development of low background techniques for bolometric double-beta decay searches.

scholarly journals Hiding neutrinoless double beta decay in the minimal seesaw mechanism

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
Takehiko Asaka ◽  
Hiroyuki Ishida ◽  
Kazuki Tanaka
Keyword(s):  
Beta Decay ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Seesaw Mechanism

scholarly journals Role of Single-Particle Energies in Microscopic Interacting Boson Model Double Beta Decay Calculations

Universe ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 66
Author(s):  
Jenni Kotila
Keyword(s):  
Beta Decay ◽  
Single Particle ◽  
Field Potential ◽  
Double Beta Decay ◽  
Interacting Boson Model ◽  
Model Calculations ◽  
Single Particle Level ◽  
Particle Level ◽  
Boson Model

Single-particle level energies form a significant input in nuclear physics calculations where single-particle degrees of freedom are taken into account, including microscopic interacting boson model investigations. The single-particle energies may be treated as input parameters that are fitted to reach an optimal fit to the data. Alternatively, they can be calculated using a mean field potential, or they can be extracted from available experimental data, as is done in the current study. The role of single-particle level energies in the microscopic interacting boson model calculations is discussed with special emphasis on recent double beta decay calculations.

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