Double-Beta Decay of 48Ca within the STDA Method Based on Realistic Interaction with Density-Dependent Corrective Term
- NázevTitle
- Double-Beta Decay of 48Ca within the STDA Method Based on Realistic Interaction with Density-Dependent Corrective TermDouble-Beta Decay of 48Ca within the STDA Method Based on Realistic Interaction with Density-Dependent Corrective Term
- Druh výsledkuResult type
- Příspěvek ve sborníkuProceedings paper
- AutořiAuthors
- P. Veselý, D. Denisova, F. Knapp, F. Šimkovic
- Klíčová slovaKeywords
- double beta decay, 48Ca, STDA Method
- KonferenceConference
- 42nd International Workshop on Nuclear Theory (Rila Mountains, Bulgaria, 2025-06-29)
- Časopis / citaceJournal / citation
- In: Proceedings of the 42-nd International Workshop on Nuclear Theory (IWNT-42) 42, Heron Press Ltd., 2025, pp. 183-189 · ISSN 1313-2822
- RokYear
- 2025
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- 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; Inženýrské aplikace fyziky mikrosvětaEngineering applications of microworld physics
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
We investigate nuclear matrix elements for two-neutrino double-beta decay of 48Ca using the Second Tamm-Dancoff method. This approach employs a realistic chiral nucleon-nucleon interaction, known as NNLO_opt, which is supplemented by phenomenological density-dependent terms that incorporate both isoscalar (T = 0) and isovector (T = 1) channels. We adjust the coupling constants for these channels to minimize the corresponding Fermi matrix element. This value is negligible compared to the Gamow-Teller nuclear matrix element, suggesting the restoration of isospin symmetry. Our calculations provide a foundation for a more detailed study, in which we will address the issue of quenching the weak coupling constant g_A.
We investigate nuclear matrix elements for two-neutrino double-beta decay of 48Ca using the Second Tamm-Dancoff method. This approach employs a realistic chiral nucleon-nucleon interaction, known as NNLO_opt, which is supplemented by phenomenological density-dependent terms that incorporate both isoscalar (T = 0) and isovector (T = 1) channels. We adjust the coupling constants for these channels to minimize the corresponding Fermi matrix element. This value is negligible compared to the Gamow-Teller nuclear matrix element, suggesting the restoration of isospin symmetry. Our calculations provide a foundation for a more detailed study, in which we will address the issue of quenching the weak coupling constant g_A.