Estimation of nuclear matrix elements of double-β decay from shell model and quasiparticle random-phase approximation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F21%3A00354839" target="_blank" >RIV/68407700:21670/21:00354839 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1140/epjp/s13360-021-01886-y" target="_blank" >https://doi.org/10.1140/epjp/s13360-021-01886-y</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epjp/s13360-021-01886-y" target="_blank" >10.1140/epjp/s13360-021-01886-y</a>
Alternative languages
Result language
angličtina
Original language name
Estimation of nuclear matrix elements of double-β decay from shell model and quasiparticle random-phase approximation
Original language description
The nuclear matrix element (NME) of neutrinoless double-β (0νββ) decay is an essential input for determining the neutrino effective mass, if the half-life of this decay is measured. Reliable calculation of this NME has been a long-standing problem because of the diversity of the predicted values of the NME, which depends on the calculation method. In this study, we focus on the shell model and the QRPA. The shell model has a rich amount of the many-particle many-hole correlations, and the quasiparticle random-phase approximation (QRPA) can obtain the convergence of the calculation results with respect to the extension of the single-particle space. It is difficult for the shell model to obtain the convergence of the 0νββ NME with respect to the valence single-particle space. The many-body correlations of the QRPA may be insufficient, depending on the nuclei. We propose a new method to phenomenologically modify the results of the shell model and the QRPA compensating for the insufficiencies of each method using the information of other methods in a complementary manner. Extrapolations of the components of the 0νββ NME of the shell model are made toward a very large valence single-particle space. We introduce a modification factor to the components of the 0νββ NME of the QRPA. Our modification method yields similar values of the 0νββ NME for the two methods with respect to 48Ca. The NME of the two-neutrino double-β decay is also modified in a similar but simpler manner, and the consistency of the two methods is improved.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
<a href="/en/project/EF16_019%2F0000766" target="_blank" >EF16_019/0000766: Engineering applications of microworld physics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
EUROPEAN PHYSICAL JOURNAL PLUS
ISSN
2190-5444
e-ISSN
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Volume of the periodical
2021 (136)
Issue of the periodical within the volume
September
Country of publishing house
DE - GERMANY
Number of pages
19
Pages from-to
1-19
UT code for WoS article
000694249700005
EID of the result in the Scopus database
2-s2.0-85114326264