Effects of perturbation of the transition operator in double-β decay on nuclear matrix elements, effective axial-vector current coupling, and half-life

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of perturbation of the transition operator in double-β decay on nuclear matrix elements, effective axial-vector current coupling, and half-life

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Effects of perturbation of the transition operator in double-β decay on nuclear matrix elements, effective axial-vector current coupling, and half-life

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/GA24-10180S" target="_blank" >GA24-10180S: Zkoumaní vlastností neutrin prostřednictvím dvojitého beta rozpadu: Souhra teorie a experimentu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

PHYSICAL REVIEW C

ISSN

2469-9985

e-ISSN

2469-9993

Svazek periodika

112

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

21

Strana od-do

"024304-1"-"024304-21"

Kód UT WoS článku

001546301300007

EID výsledku v databázi Scopus

2-s2.0-105020744184