Measurement of the 2νββ Decay Rate and Spectral Shape of 100Mo from the CUPID-Mo Experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F23%3A00371305" target="_blank" >RIV/68407700:21670/23:00371305 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevLett.131.162501" target="_blank" >https://doi.org/10.1103/PhysRevLett.131.162501</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.131.162501" target="_blank" >10.1103/PhysRevLett.131.162501</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of the 2νββ Decay Rate and Spectral Shape of 100Mo from the CUPID-Mo Experiment

Popis výsledku v původním jazyce

Neutrinoless double beta decay (0 nu beta beta) is a yet unobserved nuclear process that would demonstrate Lepton number violation, a clear evidence of beyond standard model physics. The process two neutrino double beta decay (2 nu beta beta) is allowed by the standard model and has been measured in numerous experiments. In this Letter, we report a measurement of 2 nu beta beta decay half-life of Mo-100 to the ground state of Ru-100 of [7.07 +/- 0.02(stat) +/- 0.11(syst)+/- x 10(18) yr by the CUPID-Mo experiment. With a relative precision of +/- 1.6% this is the most precise measurement to date of a 2 nu beta beta decay rate in Mo-100. In addition, we constrain higher-order corrections to the spectral shape, which provides complementary nuclear structure information. We report a novel measurement of the shape factor xi(3,1) = 0.45 +/- 0.03(stat) +/- 0.05(syst) based on a constraint on the ratio of higher-order terms from theory, which can be reliably calculated. This is compared to theoretical predictions for different nuclear models. We also extract the first value for the effective axial vector coupling constant obtained from a spectral shape study of 2 nu beta beta decay.

Název v anglickém jazyce

Measurement of the 2νββ Decay Rate and Spectral Shape of 100Mo from the CUPID-Mo Experiment

Popis výsledku anglicky

Neutrinoless double beta decay (0 nu beta beta) is a yet unobserved nuclear process that would demonstrate Lepton number violation, a clear evidence of beyond standard model physics. The process two neutrino double beta decay (2 nu beta beta) is allowed by the standard model and has been measured in numerous experiments. In this Letter, we report a measurement of 2 nu beta beta decay half-life of Mo-100 to the ground state of Ru-100 of [7.07 +/- 0.02(stat) +/- 0.11(syst)+/- x 10(18) yr by the CUPID-Mo experiment. With a relative precision of +/- 1.6% this is the most precise measurement to date of a 2 nu beta beta decay rate in Mo-100. In addition, we constrain higher-order corrections to the spectral shape, which provides complementary nuclear structure information. We report a novel measurement of the shape factor xi(3,1) = 0.45 +/- 0.03(stat) +/- 0.05(syst) based on a constraint on the ratio of higher-order terms from theory, which can be reliably calculated. This is compared to theoretical predictions for different nuclear models. We also extract the first value for the effective axial vector coupling constant obtained from a spectral shape study of 2 nu beta beta decay.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/LM2023063" target="_blank" >LM2023063: Podzemní laboratoř LSM - účast České republiky</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

1079-7114

Svazek periodika

131

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

"162501-1"-"162501-7"

Kód UT WoS článku

001102983000005

EID výsledku v databázi Scopus

2-s2.0-85176350003