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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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

  • 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