Tables of Double Beta Decay Data—an Update

Tretyak, V. I.; Zdesenko, Y.G.

doi:10.1006/adnd.2001.0873

Cited by 285 publications

(178 citation statements)

References 75 publications

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“…The details of recent experiments are found in reviews [4][5][6]20,21) and the compilation of the data. 25) Nuclei used in experiments are selected by taking into account the matrix element, the phase space, the Q value, the isotopic abundance (A) and the feasibility of isotope separation. Large Q values help improve signal-to-BG ratios since the phase space is proportional to Q 5 and most BG RI signals are below 3 MeV.…”

Section: Present Status Of Experimentsmentioning

confidence: 99%

Double Beta Decays and Neutrino Masses

2005

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Neutrino-less double beta decays (0), which violate the lepton number conservation law by ÁL ¼ 2, are of great interest for studying the fundamental properties of neutrinos beyond the standard electroweak theory. High-sensitivity 0 studies with mass sensitivities of the solar and atmosphericmasses are crucial for studying the Majorana nature of 's, the mass spectrum, the absolute -mass scale, the Majorana CP phases and other fundamental properties of neutrinos and weak interactions. Actually, high-sensitivity experiments of 0 are the unique and practical method for studying all these fundamental properties of neutrinos in the foreseeable future. On the basis of the recent oscillation studies, the effective mass sensitivity required for observing the 0 rate is of the order of the atmospheric mass scale of m A $ 50 meV in the case of the inverted mass hierarchy and of the order of the solar mass scale of m S $ 8 meV in the case of the normal hierarchy. The present detectors with sensitivities of 150 -300 meV are effective in the case of the quasi-degenerate mass spectrum. Future detectors with higher sensitivities of the orders of m A -m S , using different nuclei and methods (calorimetric, spectroscopic), are indispensable for establishing 0. Theoretical and experimental studies for evaluating nuclear matrix elements M 0 within 20 -30% are important for extracting the sensible mass from the 0 rate. Charge exchange reactions by means of nuclear, electron and probes provide useful data for M 0 . International collaboration for experimental and theoretical works are encouraged to perform next-generation experiments. High-sensitivity detectors can be used for studying rare nuclear processes such as solar 's, dark matter, charge nonconservation, and nucleon decays. This report is a brief review of double beta decays and neutrinos with emphasis on highsensitivity 0 studies for the Majorana mass.

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Section: Present Status Of Experimentsmentioning

confidence: 99%

Double Beta Decays and Neutrino Masses

2005

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“…There is no real justification for depending on the absolute value of these as being accurate. They are the average values mainly taken from the list given by Tretyak and Zdesenko [14], and work published since. A few calculations that were shown later to be incorrect were not included.…”

Section: Available Isotopesmentioning

confidence: 99%

Strategies for Next Generation Neutrinoless Double-Beta Decay Experiments

Avignone

2005

Nuclear Physics B - Proceedings Supplements

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A brief discussion of the connection between neutrino oscillation data and predictions of neutrinoless doublebeta decay half-lives is given. Two convenient figure of merit formulae are discussed in the context of the various isotopes and technologies proposed. These allow definite evaluation of the merits of the various proposed experiments. Other criteria are discussed, which in total, if applied, should give all the necessary tools for comparative evaluation.

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“…There are few tenths of nuclear systems [4], which offer an opportunity to study the 0νββ-decay and the most favorable are those with a large Q ββ -value.…”

Section: Introductionmentioning

confidence: 99%

Nuclear matrix elements for neutrinoless double-beta decay and double-electron capture

Faessler

Rodin

Šimkovic

2012

J. Phys. G: Nucl. Part. Phys.

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A new generation of neutrinoless double beta decay (0νββ-decay) experiments with improved sensitivity is currently under design and construction. They will probe inverted hierarchy region of the neutrino mass pattern. There is also a revived interest to the resonant neutrinoless doubleelectron capture (0νECEC), which has also a potential to probe lepton number conservation and to investigate the neutrino nature and mass scale. The primary concern are the nuclear matrix elements. Clearly, the accuracy of the determination of the effective Majorana neutrino mass from the measured 0νββ-decay half-life is mainly determined by our knowledge of the nuclear matrix elements. We review recent progress achieved in the calculation of 0νββ and 0νECEC nuclear matrix elements within the quasiparticle random phase approximation. A considered self-consistent approach allow to derive the pairing, residual interactions and the two-nucleon short-range correlations from the same modern realistic nucleon-nucleon potentials. The effect of nuclear deformation is taken into account. A possibility to evaluate 0νββ-decay matrix elements phenomenologically is discussed.

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Tables of Double Beta Decay Data—an Update

Cited by 285 publications

References 75 publications

Double Beta Decays and Neutrino Masses

Double Beta Decays and Neutrino Masses

Strategies for Next Generation Neutrinoless Double-Beta Decay Experiments

Nuclear matrix elements for neutrinoless double-beta decay and double-electron capture

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