Electron-capture branching ratio measurements of odd-odd intermediate nuclei in double-beta decay at the TITAN facility

2013 ◽  
pp. 157-164
Author(s):  
A. Lennarz ◽  
T. Brunner ◽  
C. Andreoiu ◽  
A. Chaudhuri ◽  
U. Chowdhury ◽  
...  
Keyword(s):  
Electron Capture ◽  
Beta Decay ◽  
Branching Ratio ◽  
Double Beta Decay

Electron-capture branching ratio measurements of odd-odd intermediate nuclei in double-beta decay at the TITAN facility

2013 ◽  
Vol 225 (1-3) ◽  
pp. 157-164 ◽  
Author(s):  
A. Lennarz ◽  
T. Brunner ◽  
C. Andreoiu ◽  
A. Chaudhuri ◽  
U. Chowdhury ◽  
...  
Keyword(s):  
Electron Capture ◽  
Beta Decay ◽  
Branching Ratio ◽  
Double Beta Decay

scholarly journals Search for Double Beta Decay of 106Cd with an Enriched 106CdWO4 Crystal Scintillator in Coincidence with CdWO4 Scintillation Counters

Universe ◽  
2020 ◽  
Vol 6 (10) ◽  
pp. 182
Author(s):  
Pierluigi Belli ◽  
R. Bernabei ◽  
V.B. Brudanin ◽  
F. Cappella ◽  
V. Caracciolo ◽  
...  
Keyword(s):  
Electron Capture ◽  
Beta Decay ◽  
Ground State ◽  
Half Life ◽  
Double Beta Decay ◽  
Cadmium Tungstate ◽  
Positron Emission ◽  
Double Electron ◽  
Theoretical Predictions ◽  
Crystal Scintillator

Studies on double beta decay processes in 106Cd were performed by using a cadmium tungstate scintillator enriched in 106Cd at 66% (106CdWO4) with two CdWO4 scintillation counters (with natural Cd composition). No effect was observed in the data that accumulated over 26,033 h. New improved half-life limits were set on the different channels and modes of the 106Cd double beta decay at level of limT1/2∼1020−1022 yr. The limit for the two neutrino electron capture with positron emission in 106Cd to the ground state of 106Pd, T1/22νECβ+≥2.1×1021 yr, was set by the analysis of the 106CdWO4 data in coincidence with the energy release 511 keV in both CdWO4 counters. The sensitivity approaches the theoretical predictions for the decay half-life that are in the range T1/2∼1021−1022 yr. The resonant neutrinoless double-electron capture to the 2718 keV excited state of 106Pd is restricted at the level of T1/20ν2K≥2.9×1021 yr.

scholarly journals CONSTRAINTS ON TeV SCALE MAJORANA NEUTRINO PHENOMENOLOGY FROM THE VACUUM STABILITY OF THE HIGGS

2013 ◽  
Vol 28 (11) ◽  
pp. 1350032 ◽  
Author(s):  
JOYDEEP CHAKRABORTTY ◽  
MOUMITA DAS ◽  
SUBHENDRA MOHANTY
Keyword(s):  
Beta Decay ◽  
Neutrino Mass ◽  
Stability Condition ◽  
Branching Ratio ◽  
Neutrinoless Double Beta Decay ◽  
Majorana Neutrino ◽  
Double Beta Decay ◽  
Heavy Neutrino ◽  
Neutrino Mixing ◽  
Vacuum Stability

The vacuum stability condition of the Standard Model (SM) Higgs potential with mass in the range of 124–127 GeV puts an upper bound on the Dirac mass of the neutrinos. We study this constraint with the right-handed neutrino masses up to TeV scale. The heavy neutrinos contribute to ΔL = 2 processes like neutrinoless double beta decay and same-sign-dilepton (SSD) production in the colliders. The vacuum stability criterion also restricts the light-heavy neutrino mixing and constrains the branching ratio (BR) of lepton flavor-violating process, like μ→eγ mediated by the heavy neutrinos. We show that neutrinoless double beta decay with a lifetime ~1025 years can be observed if the lightest heavy neutrino mass is <4.5 TeV. We show that the vacuum stability condition and the experimental bound on μ→e γ together put a constrain on heavy neutrino mass MR>3.3 TeV. Finally we show that the observation of SSDs associated with jets at the LHC needs much larger luminosity than available at present. We have estimated the possible maximum cross-section for this process at the LHC and show that with an integrated luminosity 100 fb-1 it may be possible to observe the SSD signals as long as MR < 400 GeV.

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 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).

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