Half-life of 136Xe for neutrinoless double-β decay calculated with effective axial-vector current coupling unified for two-neutrino and neutrinoless double-β decay modes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00386203" target="_blank" >RIV/68407700:21670/25:00386203 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/t2mf-c4yc" target="_blank" >https://doi.org/10.1103/t2mf-c4yc</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/t2mf-c4yc" target="_blank" >10.1103/t2mf-c4yc</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Half-life of 136Xe for neutrinoless double-β decay calculated with effective axial-vector current coupling unified for two-neutrino and neutrinoless double-β decay modes

Popis výsledku v původním jazyce

The upper limit on the mass of the Majorana neutrino, extracted from the limits on the nonobservation of the neutrinoless double-β (0νββ) decay, is hampered by uncertainties in the matrix elements of the transition operators. Recently, we have shown that the values of the effective axial-vector current coupling constants (geffA) for the 0νββ and the two-neutrino double-β decays are close. This striking result was obtained for the first time by including vertex corrections and two-body currents in these matrix elements. In this Letter, we calculate the half-life for the 0νββ decay (T^0ν_1/2) of 136Xe using this closeness and show the convergence of the half-life with respect to the variation of the method to determine geffA . The closeness of the geffA of the two decay modes plays a decisive role in predicting T^0ν_1/2. The appropriate value of geffA depends on the assumptions made for the sectors of the nuclear structure and transition operators of the calculations within the perturbation scheme. The value geffA ~ 1 is obtained when the SkM* is used to describe the nuclear structure component, while a smaller value of geffA is obtained by applying a less realistic interaction like the SGII one.

Název v anglickém jazyce

Half-life of 136Xe for neutrinoless double-β decay calculated with effective axial-vector current coupling unified for two-neutrino and neutrinoless double-β decay modes

Popis výsledku anglicky

The upper limit on the mass of the Majorana neutrino, extracted from the limits on the nonobservation of the neutrinoless double-β (0νββ) decay, is hampered by uncertainties in the matrix elements of the transition operators. Recently, we have shown that the values of the effective axial-vector current coupling constants (geffA) for the 0νββ and the two-neutrino double-β decays are close. This striking result was obtained for the first time by including vertex corrections and two-body currents in these matrix elements. In this Letter, we calculate the half-life for the 0νββ decay (T^0ν_1/2) of 136Xe using this closeness and show the convergence of the half-life with respect to the variation of the method to determine geffA . The closeness of the geffA of the two decay modes plays a decisive role in predicting T^0ν_1/2. The appropriate value of geffA depends on the assumptions made for the sectors of the nuclear structure and transition operators of the calculations within the perturbation scheme. The value geffA ~ 1 is obtained when the SkM* is used to describe the nuclear structure component, while a smaller value of geffA is obtained by applying a less realistic interaction like the SGII one.

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

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

"L051302-1"-"L051302-6"

Kód UT WoS článku

001619220500005

EID výsledku v databázi Scopus

2-s2.0-105026587784