Effects of perturbation of the transition operator in double-β decay on nuclear matrix elements, effective axial-vector current coupling, and half-life
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00384758" target="_blank" >RIV/68407700:21670/25:00384758 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/b52z-dhzn" target="_blank" >https://doi.org/10.1103/b52z-dhzn</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/b52z-dhzn" target="_blank" >10.1103/b52z-dhzn</a>
Alternative languages
Result language
angličtina
Original language name
Effects of perturbation of the transition operator in double-β decay on nuclear matrix elements, effective axial-vector current coupling, and half-life
Original language description
We calculate the nuclear matrix element (NME), effective axial-vector current coupling geffA, and half-life of double-β (ββ) decay using the transition operator perturbed by the nuclear interaction. The correction terms for the NME are obtained by extending the hadron sector to a higher order in terms of the Rayleigh-Schrödinger perturbation theory. The NME calculations are performed for the neutrinoless ββ (0vββ) and the two-neutrino ββ (2vββ) decays of 136Xe. The nuclear wave functions are calculated by the quasiparticle random-phase approximation (QRPA) with the Skyrme, the Coulomb, and the contact pairing interactions. Sufficiently large single-particle valence spaces are used. The correction terms for the NME are comparable with the leading term in absolute value, and the sum of the corrections has the opposite sign compared to that of the leading term. The geff A's for the ββ NME are calculated by a few methods depending on the truncation of the NME and the half-life referred to. Similarities are found between some of these geffA's, including those of the 0vββ NME. This leads to the conclusion that the value of geff A can indeed be determined by the perturbed transition operator. It is in a comparable range of the gA for the 2vββ NME. The perturbation effect on the 2vββ half-life is discussed by comparing the calculated half-lives with the different gA's and the NME components.
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/GA24-10180S" target="_blank" >GA24-10180S: Exploring the Properties of Neutrinos through Double Beta Decay: An Interplay between Theory and Experiment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PHYSICAL REVIEW C
ISSN
2469-9985
e-ISSN
2469-9993
Volume of the periodical
112
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
21
Pages from-to
"024304-1"-"024304-21"
UT code for WoS article
001546301300007
EID of the result in the Scopus database
2-s2.0-105020744184