A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Measurement of the 2νββ Decay Rate and Spectral Shape of 100Mo from the CUPID-Mo Experiment (2023)

CUPID-Mo Collaboration. (2023). Measurement of the 2νββ Decay Rate and Spectral Shape of 100Mo from the CUPID-Mo Experiment. Physical Review Letters, 131, Article 162501. https://doi.org/10.1103/PhysRevLett.131.162501

JYU-tekijät tai -toimittajat

Kotila, Jenni

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: CUPID-Mo Collaboration

Lehti tai sarja: Physical Review Letters

ISSN: 0031-9007

eISSN: 1079-7114

Julkaisuvuosi: 2023

Ilmestymispäivä: 18.10.2023

Volyymi: 131

Artikkelinumero: 162501

Kustantaja: American Physical Society (APS)

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1103/PhysRevLett.131.162501

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus: 

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/90667

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2307.14086

Tiivistelmä

Neutrinoless double beta decay (0νββ) 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 (2νββ) is allowed by the standard model and has been measured in numerous experiments. In this Letter, we report a measurement of 2νββ decay half-life of 100Mo to the ground state of 100Ru of [7.07±0.02(stat)±0.11(syst)]×1018  yr by the CUPID-Mo experiment. With a relative precision of ±1.6% this is the most precise measurement to date of a 2νββ decay rate in 100Mo. 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 ξ3,1=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 2νββ decay.

YSO-asiasanat: ydinfysiikka; hiukkasfysiikka

Liittyvät organisaatiot

Hankkeet, joissa julkaisu on tehty

OKM-raportointi: Kyllä

Raportointivuosi: 2023

Alustava JUFO-taso: 3