Nuclear and Detector Sensitivities for Neutrinoless Double Beta-Decay Experiments

Ejiri, H.

doi:10.1155/2021/6666720

Cited by 2 publications

(5 citation statements)

References 34 publications

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“…The effective Majorana mass is defined through the process of atomic nucleus decay using Feynman diagram, which is the subject of experimental measurements [5] [7] [11]. Thus, we have two ways of obtaining the effective Majorana mass: one is defined by formulas (100, 101), and the second by formulas (103, 104).…”

Section: Discussionmentioning

confidence: 99%

“…T is the half-life of neutrinoless double-beta decay, A g -is the axial-vector weak coupling, 0 G ν is a phase-space factor which determines how many electrons have the right energies and momenta to participate in the process. We expect that in experiments [5], if a signal in the range (103) were detected then the hierarchy of neutrinos would be normal, while the appearance of the signal in the range (104) would be a confirmation that the neutrinos belong to the inverted mass hierarchy.…”

Section: Prediction Of the Effective Majorana Massmentioning

confidence: 96%

“…Here it is important to point out that 21 31 , α α are Majorana phases that have physical sense, and which appear in the process of neutrinoless double beta decay [2] [4] [5] [6] [7]. If we take equations into account, (10) and (11), we will reach a unique solution:…”

Section: The First Example Group ′ a 5 Seesaw Type Weinberg Matrix M νmentioning

confidence: 99%

“…On the other hand, we have a process where observations of double beta decay without emission of neutrinos are researched, which is described by the following nuclear reaction [5] [11] [12] [13] [14] [15]:…”

Section: Prediction Of the Effective Majorana Massmentioning

confidence: 99%

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Determining the Neutrino Mass Eigenstates and the Effective Majorana Mass

Todorović¹

2022

JHEPGC

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This paper aims at solving several open questions in current neutrino physics: the neutrino mass hierarchy, the Dirac CP violating phase, the absolute mass of neutrinos, the nature of neutrinos (Dirac or Majorana), the Majorana matrix and the absolute value of the effective Majorana neutrino mass. In the research presented in this paper, we have shown that the precise definition of the mass splittings between neutrino mass eigenstates, done in the latest analysis of experimental data, can be of crucial importance for defining the nature of neutrino mass hierarchy. The Standard Model has three generations of fundamental matter particles. Three generations of the charged lepton mass show a hierarchical structure: e m m m τ µ > > .Owing to that, there is a belief and it is considered that neutrinos may follow such hierarchical structure. In our calculations, we have also included the latest data obtained, based on the processing of measurement results, which showed that even with such data, obtained results favor the normal neutrino mass hierarchy. As for the individual neutrino mass calculated in this paper, in today's neutrino physics it is only known that neutrino mass scale is bounded only from above, and both the Dirac and the Majorana character of neutrinos are compatible with all observations. Among some of the questions resolved in this paper, which are related to the properties of neutrinos, a positive answer was also given to the question of whether light neutrinos are self-conjugate particles or not.

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Section: Discussionmentioning

confidence: 99%

Section: Prediction Of the Effective Majorana Massmentioning

confidence: 96%

Section: The First Example Group ′ a 5 Seesaw Type Weinberg Matrix M νmentioning

confidence: 99%

Section: Prediction Of the Effective Majorana Massmentioning

confidence: 99%

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Determining the Neutrino Mass Eigenstates and the Effective Majorana Mass

Todorović¹

2022

JHEPGC

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“…Accordingly, accurate evaluations for the NME by using existing theoretical nuclear models are indeed very hard. The DBD neutrino-mass sensitivity is discussed in the review [8] and also in a recent article [19].…”

Section: Introductionmentioning

confidence: 99%

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

Ejiri

2020

Universe

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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.

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Nuclear and Detector Sensitivities for Neutrinoless Double Beta-Decay Experiments

Cited by 2 publications

References 34 publications

Determining the Neutrino Mass Eigenstates and the Effective Majorana Mass

Determining the Neutrino Mass Eigenstates and the Effective Majorana Mass

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

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