Menéndez, Javier ; Poves, Alfredo ; Caurier, Etienne ; Nowacki, Frederic (2011)
Neutrinoless Double Beta Decay The Nuclear Matrix Elements Revisited.
In: Journal of Physics: Conference Series, 312 (7)
doi: 10.1088/1742-6596/312/7/072005
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
We explore the influence of the deformation on the nuclear matrix elements of the neutrinoless double beta decay (NME), concluding that the difference in deformation -or more generally in the amount of quadrupole correlations- between parent and grand daughter nuclei quenches strongly the decay. We correlate these differences with the seniority structure of the nuclear wave functions. In this context, we examine the present discrepancies between the NME's obtained in the framework of the Interacting Shell Model and the Quasiparticle RPA. In our view, part of the discrepancy can be due to the limitations of the spherical QRPA in treating nuclei which have strong quadrupole correlations. We surmise that the NME's in a basis of generalized seniority are approximately model independent, i. e. they are "universal". We discuss as well how varies the nuclear matrix element of the ⁷⁶Ge decay when the wave functions of the two nuclei involved in the transition are constrained to reproduce the experimental occupancies. In the Interacting Shell Model description the value of the NME is enhanced about 15% compared to previous calculations, whereas in the QRPA the NME's are reduced by 20%-30%. This diminishes the discrepancies between both approaches. In addition, we update the effects of the short range correlations on the NME's in the light of the recently proposed parametrizations obtained by renormalizing the 0νββ transition operator at the same footing than the effective interaction.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2011 |
| Autor(en): | Menéndez, Javier ; Poves, Alfredo ; Caurier, Etienne ; Nowacki, Frederic |
| Art des Eintrags: | Bibliographie |
| Titel: | Neutrinoless Double Beta Decay The Nuclear Matrix Elements Revisited |
| Sprache: | Englisch |
| Publikationsjahr: | 2011 |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics: Conference Series |
| Jahrgang/Volume einer Zeitschrift: | 312 |
| (Heft-)Nummer: | 7 |
| Kollation: | 9 Seiten |
| DOI: | 10.1088/1742-6596/312/7/072005 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | We explore the influence of the deformation on the nuclear matrix elements of the neutrinoless double beta decay (NME), concluding that the difference in deformation -or more generally in the amount of quadrupole correlations- between parent and grand daughter nuclei quenches strongly the decay. We correlate these differences with the seniority structure of the nuclear wave functions. In this context, we examine the present discrepancies between the NME's obtained in the framework of the Interacting Shell Model and the Quasiparticle RPA. In our view, part of the discrepancy can be due to the limitations of the spherical QRPA in treating nuclei which have strong quadrupole correlations. We surmise that the NME's in a basis of generalized seniority are approximately model independent, i. e. they are "universal". We discuss as well how varies the nuclear matrix element of the ⁷⁶Ge decay when the wave functions of the two nuclei involved in the transition are constrained to reproduce the experimental occupancies. In the Interacting Shell Model description the value of the NME is enhanced about 15% compared to previous calculations, whereas in the QRPA the NME's are reduced by 20%-30%. This diminishes the discrepancies between both approaches. In addition, we update the effects of the short range correlations on the NME's in the light of the recently proposed parametrizations obtained by renormalizing the 0νββ transition operator at the same footing than the effective interaction. |
| Zusätzliche Informationen: | International Nuclear Physics Conference 2010 (INPC2010); Erstveröffentlichung |
| Fachbereich(e)/-gebiet(e): | DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 634: Kernstruktur, nukleare Astrophysik und fundamentale Experimente bei kleinen Impulsüberträgen am supraleitenden Darmstädter Elektronenbeschleuniger S-DALINAC DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 634: Kernstruktur, nukleare Astrophysik und fundamentale Experimente bei kleinen Impulsüberträgen am supraleitenden Darmstädter Elektronenbeschleuniger S-DALINAC > D: Theoretische Kernstrukturphysik DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 634: Kernstruktur, nukleare Astrophysik und fundamentale Experimente bei kleinen Impulsüberträgen am supraleitenden Darmstädter Elektronenbeschleuniger S-DALINAC > D: Theoretische Kernstrukturphysik > D1: Theoretische Kernstrukturphysik |
| Hinterlegungsdatum: | 04 Feb 2014 14:59 |
| Letzte Änderung: | 05 Mär 2024 11:30 |
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Verfügbare Versionen dieses Eintrags
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Neutrinoless Double Beta Decay The Nuclear Matrix Elements Revisited. (deposited 23 Jan 2024 10:17)
- Neutrinoless Double Beta Decay The Nuclear Matrix Elements Revisited. (deposited 04 Feb 2014 14:59) [Gegenwärtig angezeigt]
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