Two-neutrino double-β decay matrix elements based on a relativistic nuclear energy density functional

Znanstveni rad - Izvorni znanstveni rad

• Autor: N. Popara
• Autor: A. Ravlić
• Autor: N. Paar
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

Nuclear matrix elements (NMEs) for two-neutrino double-β decay (2νββ) are studied in the framework of a relativistic nuclear energy density functional. The properties of nuclei involved in the decay are obtained using the relativistic Hartree-Bardeen-Cooper-Schrieffer theory and relevant nuclear transitions are described using the relativistic proton-neutron quasiparticle random phase approximation based on the relativistic energy density functional. Three effective interactions are employed, including density-dependent meson-exchange (DD-ME2) and point-coupling interactions (DD-PC1 and DD-PCX), and pairing correlations are described consistently both in T=1 and T=0 channels using a separable pairing interaction. The optimal values of T=0 pairing strength parameter V0pp are constrained by the experimental data on β-decay half-lives. The 2νββ matrix elements and half-lives are calculated for several nuclides experimentally known to undergo this kind of decay:48Ca, 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 124Xe, 128Te, 130Te, 136Xe, and 150Nd. The model dependence of the NMEs and their sensitivity on V0pp is investigated, and the NMEs obtained using optimal values of V0pp are discussed in comparison to previous studies. The results of the present work represent an important benchmark for the future applications of the relativistic framework in studies of neutrinoless double-β decay.

• Ključne riječi (engleski): nuclear matrix elements; two-neutrino double-β decay
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review C
• Brojčani podaci: vol. 105, br. 6, 064315
• p-ISSN: 2469-9985
• e-ISSN: 2469-9993
• DOI: https://doi.org/10.1103/PhysRevC.105.064315
• URN:NBN: urn:nbn:hr:217:401890
• Datum objave publikacije: 2022
• Projekt: Šifra: KK.01.1.1.01.0004; Naziv (engleski): QuantiXLie Center of Excellence; Kratica: QuantiXLie; Voditelj: Hrvoje Buljan, Pavle Pandžić; Pravna nadležnost: eu; Financijer: Croatian Government and European Union; Linija financiranja: European Regional Development Fund - the Competitiveness and Cohesion Operational Programme
• URL dokumenta: https://link.aps.org/doi/10.1103/PhysRevC.105.064315
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: © 2022 American Physical Society. Received 3 September 2020; Revised 19 July 2021; Accepted 19 May 2022; Published 24 June 2022.
• Datum i vrijeme pohrane: 2023-08-18 17:13:41