Consistency examinations of calculations of nuclear matrix elements of double-beta decay by QRPA
- NázevTitle
- Consistency examinations of calculations of nuclear matrix elements of double-beta decay by QRPAConsistency examinations of calculations of nuclear matrix elements of double-beta decay by QRPA
- Druh výsledkuResult type
- Příspěvek ve sborníkuProceedings paper
- AutořiAuthors
- J. Terasaki
- Klíčová slovaKeywords
- neutrinoless double beta decay, Quasiparticle Random-Phase Approximation, nuclear matrix element, effective neutrino mass, charge-change strength function, Majorana particle
- KonferenceConference
- 37th International Workshop on Nuclear Theory (Rila Mountains, Bulgaria, 2018-06-24)
- Časopis / citaceJournal / citation
- In: Proceedings of the 37th International Workshop on Nuclear Theory (IWNT-37) 37, Heron Press Ltd, 2018, pp. 3-12 · ISSN 1313-2822
- RokYear
- 2018
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Inženýrské aplikace fyziky mikrosvětaEngineering applications of microworld physics; Institucionální podpora na rozvoj výzkumné org.Institucionální podpora na rozvoj výzkumné org.
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
The neutrinoless double-beta decay is a hypothetical rare nuclear decay, which can be used for determining the neutrino-mass scale. The scheme to use this decay for determining the neutrino-mass scale is one of few limited methods possible to determine that. Nuclear matrix element of this decay is an important input to this method, and this matrix element cannot be determined by experiment. I examine the validity of the transition density used for calculating the nuclear matrix element by comparing the experimental data and my calculated result of the charge-change strength functions of 48Ca and 48Ti. The nuclear wave functions are obtained by the quasiparticle random-phase approximation. A new idea is proposed on the transition operator for this strength function, and the data of those nuclei are reproduced well consistently. Reduced half-life of a few nuclei to the neutrinoless double-beta decay are shown.
The neutrinoless double-beta decay is a hypothetical rare nuclear decay, which can be used for determining the neutrino-mass scale. The scheme to use this decay for determining the neutrino-mass scale is one of few limited methods possible to determine that. Nuclear matrix element of this decay is an important input to this method, and this matrix element cannot be determined by experiment. I examine the validity of the transition density used for calculating the nuclear matrix element by comparing the experimental data and my calculated result of the charge-change strength functions of 48Ca and 48Ti. The nuclear wave functions are obtained by the quasiparticle random-phase approximation. A new idea is proposed on the transition operator for this strength function, and the data of those nuclei are reproduced well consistently. Reduced half-life of a few nuclei to the neutrinoless double-beta decay are shown.