Effects of perturbation for transition operators of double-β decay on nuclear matrix element

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00385900" target="_blank" >RIV/68407700:21670/25:00385900 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.22323/1.495.0016" target="_blank" >https://doi.org/10.22323/1.495.0016</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.22323/1.495.0016" target="_blank" >10.22323/1.495.0016</a>

Result language
angličtina
Original language name
Effects of perturbation for transition operators of double-β decay on nuclear matrix element
Original language description
We show that the effective axial-vector current couplings (geffA) for the neutrinoless double-β (0νββ) and the two-neutrino double-β (2νββ) decays are close to each other in the decay instance of 136Xe->136Ba. This is a remarkable finding because geffA for the 0νββ decay was unknown at all. This is shown by our calculation with the transition operator perturbed by the residual nucleon-nucleon interaction. The nuclear wave functions are supplied by the quasiparticle random-phase approximation with phenomenological interactions. The sum of the correction terms of the nuclear matrix element due to the perturbation is half the leading term in absolute value and negative. The influence of the perturbation on the half-life for the 2νββ decay is also shown to be significantly large. The more perturbation, the longer the half-life.
Czech name
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Czech description
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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)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Workshop on Calculation of Double-Beta-Decay Matrix Elements (MEDEX'25)
ISBN
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ISSN
1824-8039
e-ISSN
1824-8039
Number of pages
6
Pages from-to
1-6
Publisher name
PoS - Proceedings of Science, Sissa Medialab srl
Place of publication
Trieste
Event location
Praha
Event date
Jun 23, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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