Double-beta Decay of 48Ca within Second Tamm-Dancoff Approximation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F25%3A00619659" target="_blank" >RIV/61389005:_____/25:00619659 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21670/25:00383637 RIV/00216208:11320/25:10508880

Výsledek na webu

<a href="http://dx.doi.org/10.5506/APhysPolBSupp.18.2-A9" target="_blank" >http://dx.doi.org/10.5506/APhysPolBSupp.18.2-A9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5506/APhysPolBSupp.18.2-A9" target="_blank" >10.5506/APhysPolBSupp.18.2-A9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Double-beta Decay of 48Ca within Second Tamm-Dancoff Approximation

Popis výsledku v původním jazyce

The neutrinoless double-beta decay (0νββ) nuclear matrix elements (NMEs) cannot be directly deduced from any experimental data, and their reliable calculation remains a significant challenge for the nuclear physics community. Advanced nuclear structure approaches have been developed and applied to evaluate nuclear transitions of experimental interest. However, the calculated values of 0νββ NMEs still vary widely among different methods, affecting predictions of decay rates and constraints on various lepton violation parameters. The two-neutrino double-beta (2νββ) decay, which has been experimentally confirmed for eleven isotopes, plays a crucial role in testing nuclear structure models. In this context, we present the modified formalism of the Second Tamm–Dancoff Approximation (STDA) for the calculation of double-beta decay transitions. For 2νββ of 48Ca, the corresponding NMEs are calculated within the STDA, and their dependence on relevant nuclear structure parameters is investigated. Our findings indicate that a significant quenching of the axial-vector coupling constant is necessary to accurately reproduce the half-life of 2νββ decay.

Název v anglickém jazyce

Double-beta Decay of 48Ca within Second Tamm-Dancoff Approximation

Popis výsledku anglicky

The neutrinoless double-beta decay (0νββ) nuclear matrix elements (NMEs) cannot be directly deduced from any experimental data, and their reliable calculation remains a significant challenge for the nuclear physics community. Advanced nuclear structure approaches have been developed and applied to evaluate nuclear transitions of experimental interest. However, the calculated values of 0νββ NMEs still vary widely among different methods, affecting predictions of decay rates and constraints on various lepton violation parameters. The two-neutrino double-beta (2νββ) decay, which has been experimentally confirmed for eleven isotopes, plays a crucial role in testing nuclear structure models. In this context, we present the modified formalism of the Second Tamm–Dancoff Approximation (STDA) for the calculation of double-beta decay transitions. For 2νββ of 48Ca, the corresponding NMEs are calculated within the STDA, and their dependence on relevant nuclear structure parameters is investigated. Our findings indicate that a significant quenching of the axial-vector coupling constant is necessary to accurately reproduce the half-life of 2νββ decay.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Acta Physica Polonica B - Proceedings Supplement

ISBN

—

ISSN

1899-2358

e-ISSN

—

Počet stran výsledku

8

Strana od-do

A9

Název nakladatele

Faculty of Physics, Astronomy and Applied Computer Science

Místo vydání

Krakow

Místo konání akce

Zakopane

Datum konání akce

25. 8. 2024

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

001476673100015