scholarly journals Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei

2021 ◽  
pp. 136720
Author(s):  
Lotta Jokiniemi ◽  
Pablo Soriano ◽  
Javier Menéndez
Keyword(s):  
Matrix Element ◽  
Beta Decay ◽  
Nuclear Matrix ◽  
Short Range ◽  
Neutrinoless Double Beta Decay ◽  
Nuclear Matrix Element ◽  
Double Beta Decay ◽  
Heavy Nuclei ◽  
Leading Order ◽  
Medium Mass

scholarly journals Neutrino-Mass Sensitivity and Nuclear Matrix Element for Neutrinoless Double Beta Decay

Universe ◽  
2020 ◽  
Vol 6 (12) ◽  
pp. 225
Author(s):  
Hiroyasu Ejiri
Keyword(s):  
Matrix Element ◽  
Beta Decay ◽  
Neutrino Mass ◽  
Nuclear Matrix ◽  
Experimental Studies ◽  
Neutrinoless Double Beta Decay ◽  
Nuclear Matrix Element ◽  
Double Beta Decay ◽  
Theoretical Evaluation ◽  
Mass Sensitivity

Neutrinoless double beta decay (DBD) is a useful probe to study neutrino properties such as the Majorana nature, the absolute neutrino mass, the CP phase and the others, which are beyond the standard model. The nuclear matrix element (NME) for DBD is crucial to extract the neutrino properties from the experimental transition rate. The neutrino-mass sensitivity, i.e., the minimum neutrino-mass to be measured by the DBD experiment, is very sensitive to the DBD NME. Actually, the NME is one of the key elements for designing the DBD experiment. Theoretical evaluation for the DBD NME, however, is very hard. Recently experimental studies of charge-exchange nuclear and leptonic reactions have shown to be used to get single-β NMEs associated with the DBD NME. Critical discussions are made on the neutrino-mass sensitivity and the NME for the DBD neutrino-mass study and on the experimental studies of the single-β NMEs and nuclear structures associated with DBD NMEs.

scholarly journals Weak magnetism and pseudoscalar coupling in neutrino mass mechanism of neutrinoless double beta-decay

2019 ◽  
Vol 10 ◽  
pp. 108
Author(s):  
G. Pantis ◽  
F. Simkovic
Keyword(s):  
Matrix Element ◽  
Beta Decay ◽  
Neutrino Mass ◽  
Nuclear Matrix ◽  
Random Phase ◽  
Neutrinoless Double Beta Decay ◽  
Nuclear Matrix Element ◽  
Double Beta Decay ◽  
Weak Magnetism ◽  
Pseudoscalar Coupling

In the calculations of the nuclear matrix element of Majorana neutrino mass mechanism of neutrinoless double beta decay so far only contributions from vector/axialvector part and weak magnetism of the nuclear current have been included, while other contributions have been neglected. In the present work we are examining the effect of weak magnetism and induced pseudoscalar coupling. We have performed calculations within the proton-neutron renormaiized quasiparticie random phase approximation and we have found that these additional contributions of the nucleon current, result in a considerable reduction of the nuclear matrix elements of all nuclei which we have considered. This reduction of the nuclear matrix element makes the extracted limits of the lepton number violating parameters ( < mu >, < g > and < 77^ >) less stringent yielding the best value for < mv > less than 0.62 eV for 76Ge.

Double beta decay nuclear matrix element of 48Ca

1984 ◽  
Vol 143 (4-6) ◽  
pp. 293-296 ◽  
Author(s):  
T. Tsuboi ◽  
K. Muto ◽  
H. Horie
Keyword(s):  
Matrix Element ◽  
Beta Decay ◽  
Nuclear Matrix ◽  
Nuclear Matrix Element ◽  
Double Beta Decay

Role of short range correlations on nuclear matrix elements of neutrinoless double beta decay

2011 ◽  
Author(s):  
R. Chandra ◽  
K. Chaturvedi ◽  
P. K. Rath ◽  
P. K. Raina ◽  
S. K. Singh ◽  
...  
Keyword(s):  
Beta Decay ◽  
Nuclear Matrix ◽  
Short Range ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Matrix Elements ◽  
Short Range Correlations
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