Double-Beta Decay of 48Ca within Second Tamm-Dancoff Approximation
- NázevTitle
- Double-Beta Decay of 48Ca within Second Tamm-Dancoff ApproximationDouble-Beta Decay of 48Ca within Second Tamm-Dancoff Approximation
- Druh výsledkuResult type
- Příspěvek ve sborníkuProceedings paper
- AutořiAuthors
- P. Vesely, D. Denisova, F. Knapp, F. Šimkovic
- Klíčová slovaKeywords
- 48Ca, neutrinoless double beta decay, nuclear matrix element, Second Tamm-Dancoff Approximation
- KonferenceConference
- Zakopane Conference on Nuclear Physics Extremes of the Nuclear Landscape (Zakopane, Poland, 2024-08-25)
- DOIDOI
- 10.5506/APhysPolBSupp.18.2-A9
- Časopis / citaceJournal / citation
- Acta Physica Polonica B Proceedings Supplement 18(2), 1 (2025) · ISSN 1899-2358
- RokYear
- 2025
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Inženýrské aplikace fyziky mikrosvětaEngineering applications of microworld physics; Zkoumaní vlastností neutrin prostřednictvím dvojitého beta rozpadu: Souhra teorie a experimentuExploring the Properties of Neutrinos through Double Beta Decay: An Interplay between Theory and Experiment
- CitovánoCited by
- 4 (INSPIRE-HEP)
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
The neutrinoless double-beta decay (0v beta beta) nuclear matrix elements (NMEs) cannot be directly deduced from any experimental data, and their reliable calculation remains a significant challenge for the nuclear physics community. Advanced nuclear structure approaches have been developed and applied to evaluate nuclear transitions of experimental interest. However, the calculated values of 0v beta beta NMEs still vary widely among different methods, affecting predictions of decay rates and constraints on various lepton violation parameters. The two-neutrino double-beta (2v beta beta) decay, which has been experimentally confirmed for eleven isotopes, plays a crucial role in testing nuclear structure models. In this context, we present the modified formalism of the Second Tamm-Dancoff Approximation (STDA) for the calculation of double-beta decay transitions. For 2v beta beta of Ca-48, the corresponding NMEs are calculated within the STDA, and their dependence on relevant nuclear structure parameters is investigated. Our findings indicate that a significant quenching of the axial-vector coupling constant is necessary to accurately reproduce the half-life of 2v beta beta decay.
The neutrinoless double-beta decay (0v beta beta) nuclear matrix elements (NMEs) cannot be directly deduced from any experimental data, and their reliable calculation remains a significant challenge for the nuclear physics community. Advanced nuclear structure approaches have been developed and applied to evaluate nuclear transitions of experimental interest. However, the calculated values of 0v beta beta NMEs still vary widely among different methods, affecting predictions of decay rates and constraints on various lepton violation parameters. The two-neutrino double-beta (2v beta beta) decay, which has been experimentally confirmed for eleven isotopes, plays a crucial role in testing nuclear structure models. In this context, we present the modified formalism of the Second Tamm-Dancoff Approximation (STDA) for the calculation of double-beta decay transitions. For 2v beta beta of Ca-48, the corresponding NMEs are calculated within the STDA, and their dependence on relevant nuclear structure parameters is investigated. Our findings indicate that a significant quenching of the axial-vector coupling constant is necessary to accurately reproduce the half-life of 2v beta beta decay.