Vertex correction to nuclear matrix elements of double-β decays
Identifikátory výsledku
Kód výsledku v 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>
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Vertex correction to nuclear matrix elements of double-β decays
Popis výsledku v původním jazyce
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%.
Název v anglickém jazyce
Vertex correction to nuclear matrix elements of double-β decays
Popis výsledku anglicky
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%.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
—
OECD FORD obor
10304 - Nuclear physics
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2025
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
42nd International Conference on High Energy Physics, ICHEP2024
ISBN
—
ISSN
1824-8039
e-ISSN
1824-8039
Počet stran výsledku
5
Strana od-do
"476-207-1"-"476-207-5"
Název nakladatele
PoS - Proceedings of Science, Sissa Medialab srl
Místo vydání
Trieste
Místo konání akce
Praha
Datum konání akce
18. 7. 2024
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
—