scholarly journals Search for neutrinoless double beta decay of $$^{64}$$Zn and $$^{70}$$Zn with CUPID-0

2020 ◽  
Vol 80 (8) ◽  
Author(s):  
O. Azzolini ◽  
J. W. Beeman ◽  
F. Bellini ◽  
M. Beretta ◽  
M. Biassoni ◽  
...  
Keyword(s):  
Electron Capture ◽  
Beta Decay ◽  
Credible Interval ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Experimental Results ◽  
Next Generation ◽  
Pilot Experiment ◽  
Order Of Magnitude ◽  
G 38

Abstract CUPID-0 is the first pilot experiment of CUPID, a next-generation project searching for neutrinoless double beta decay. In its first scientific run, CUPID-0 operated 26 ZnSe cryogenic calorimeters coupled to light detectors in the underground Laboratori Nazionali del Gran Sasso. In this work, we analyzed a ZnSe exposure of 11.34 kg year to search for the neutrinoless double beta decay of $$^{70}$$70Zn and for the neutrinoless positron-emitting electron capture of $$^{64}$$64Zn. We found no evidence for these decays and set 90$$\%$$% credible interval limits of $$\hbox {T}_{1/2}^{0\nu \beta \beta }$$T1/20νββ($$^{70}$$70Zn) > 1.6 $$10^{21}$$1021 year and $$\hbox {T}_{1/2}^{0\nu EC \beta +}$$T1/20νECβ+($$^{64}$$64Zn) > 1.2$$\times 10^{22}$$×1022 year, surpassing by more than one order of magnitude the previous experimental results (Belli et al. in J Phys G 38(11):115107, https://doi.org/10.1088/0954-3899/38/11/115107, 2011).

scholarly journals The NEXT generation of neutrinoless double beta decay experiments

2009 ◽  
Vol 171 ◽  
pp. 012068 ◽  
Author(s):  
J J Gómez Cadenas ◽  
J Martín-Albo ◽  
J Muñoz Vidal ◽  
M Sorel
Keyword(s):  
Beta Decay ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Next Generation

scholarly journals Neutrino masses from low scale partial compositeness

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Zackaria Chacko ◽  
Patrick J. Fox ◽  
Roni Harnik ◽  
Zhen Liu
Keyword(s):  
Beta Decay ◽  
Form Factors ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Neutrino Masses ◽  
Hidden Sector ◽  
Partial Compositeness ◽  
Order Of Magnitude ◽  
Partially Composite ◽  
Compositeness Scale

Abstract We consider a class of models in which the neutrinos acquire Majorana masses through mixing with singlet neutrinos that emerge as composite states of a strongly coupled hidden sector. In this framework, the light neutrinos are partially composite particles that obtain their masses through the inverse seesaw mechanism. We focus on the scenario in which the strong dynamics is approximately conformal in the ultraviolet, and the compositeness scale lies at or below the weak scale. The small parameters in the Lagrangian necessary to realize the observed neutrino masses can naturally arise as a consequence of the scaling dimensions of operators in the conformal field theory. We show that this class of models has interesting implications for a wide variety of experiments, including colliders and beam dumps, searches for lepton flavor violation and neutrinoless double beta decay, and cosmological observations. At colliders and beam dumps, this scenario can give rise to striking signals involving multiple displaced vertices. The exchange of hidden sector states can lead to observable rates for flavor violating processes such as μ → eγ and μ → e conversion. If the compositeness scale lies at or below a hundred MeV, the rate for neutrinoless double beta decay is suppressed by form factors and may be reduced by an order of magnitude or more. The late decays of relic singlet neutrinos can give rise to spectral distortions in the cosmic microwave background that are large enough to be observed in future experiments.

scholarly journals Study of rare nuclear processes with CUORE

2018 ◽  
Vol 33 (09) ◽  
pp. 1843002 ◽  
Author(s):  
C. Alduino ◽  
K. Alfonso ◽  
F. T. Avignone ◽  
O. Azzolini ◽  
G. Bari ◽  
...  
Keyword(s):  
Dark Matter ◽  
Electron Capture ◽  
Beta Decay ◽  
Upper Bound ◽  
Half Life ◽  
Particle Physics ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Small Scale ◽  
Nuclear Processes

TeO2 bolometers have been used for many years to search for neutrinoless double beta decay in [Formula: see text]Te. CUORE, a tonne-scale TeO2 detector array, recently published the most sensitive limit on the half-life, [Formula: see text] yr, which corresponds to an upper bound of 140–400 meV on the effective Majorana mass of the neutrino. While it makes CUORE a world-leading experiment looking for neutrinoless double beta decay, it is not the only study that CUORE will contribute to in the field of nuclear and particle physics. As already done over the years with many small-scale experiments, CUORE will investigate both rare decays (such as the two-neutrino double beta decay of [Formula: see text]Te and the hypothesized electron capture in [Formula: see text]Te), and rare processes (e.g. dark matter and axion interactions). This paper describes some of the achievements of past experiments that used TeO2 bolometers, and perspectives for CUORE.

scholarly journals Neutrino mass ordering in future neutrinoless double beta decay experiments

2016 ◽  
Vol 31 (22) ◽  
pp. 1630020
Author(s):  
Jue Zhang
Keyword(s):  
Quantitative Analysis ◽  
Beta Decay ◽  
Neutrino Mass ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Next Generation ◽  
Beta Decays

Motivated by recent intensive experimental efforts on searching for neutrinoless double beta decays, we present a detailed quantitative analysis on the prospect of resolving neutrino mass ordering in the next generation [Formula: see text]Ge-type experiments.

scholarly journals EXPERIMENTS FOR NEUTRINOLESS DOUBLE-BETA DECAY

2003 ◽  
Vol 18 (22) ◽  
pp. 4097-4111 ◽  
Author(s):  
STEVEN R. ELLIOTT
Keyword(s):  
Beta Decay ◽  
Neutrino Oscillation ◽  
Neutrino Mass ◽  
Neutrinoless Double Beta Decay ◽  
Majorana Neutrino ◽  
Double Beta Decay ◽  
Experimental Results ◽  
Null Results ◽  
Exciting Time ◽  
Majorana Neutrino Mass

The recent neutrino oscillation experimental results indicate that at least one neutrino has a mass greater than 50 meV. The next generation of double-beta decay experiments will very likely have a sensitivity to an effective Majorana neutrino mass below this target. Therefore this is a very exciting time for this field of research as even null results from these experiments have the potential to elucidate the nature of the neutrino.

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