Vertex correction to nuclear matrix elements of double-β decays

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00378223" target="_blank" >RIV/68407700:21670/25:00378223 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.22323/1.476.0207" target="_blank" >https://doi.org/10.22323/1.476.0207</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.22323/1.476.0207" target="_blank" >10.22323/1.476.0207</a>

Result language
angličtina
Original language name
Vertex correction to nuclear matrix elements of double-β decays
Original language description
The predicted neutrinoless double-β (0vββ) decay is the crucial phenomenon to prove the existence of the Majorana neutrino, which gives a foundation to leptogenesis to explain the matter prevalence of the universe. The nuclear matrix element (NME) of 0vββ decay is an important theoretical quantity to determine the effective neutrino mass and help the detector design for the next generation of the 0vββ decay search. Reliable calculation of this NME is a long-standing problem because of the diversity of the predicted values of the NME. The main reason for this difficulty is that the effective strength of the Gamow-Teller transition operator g_A for this decay is unknown. I will show the lowest-order vertex corrections for the 0vββ and the 2vββ NME of 136Xe in the framework of the hybrid application of the quantum field theory to the leptons and the Rayleigh-Schrödinger perturbation to the nucleus. The unperturbed nuclear states are obtained by the quasiparticle random-phase approximation. These corrections reduce the 0vββ NME by 30%. The effective g_A referring to this reduced NME is also obtained, and it is shown for the first time that the effective g_A for the 0vββ NME is not quite different from that for the 2vββ NME; the difference is only 10%.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
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
42nd International Conference on High Energy Physics, ICHEP2024
ISBN
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ISSN
1824-8039
e-ISSN
1824-8039
Number of pages
5
Pages from-to
"476-207-1"-"476-207-5"
Publisher name
PoS - Proceedings of Science, Sissa Medialab srl
Place of publication
Trieste
Event location
Praha
Event date
Jul 18, 2024
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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