Novel nuclear structure aspects of the Oνββ-decay
EntityUAM. Departamento de Física Teórica
PublisherIOP Publishing Ltd.; Elsevier B.V.
10.1088/1742-6596/267/1/012058Journal of Physics: Conference Series 267.1 (2011): 012058
ISSN1742-6588 (print); 1742-6596 (online)
Funded byThis work is partly supported by the Spanish Ministry of Ciencia e Innovación under grant FPA2009-13377, by the Comunidad de Madrid (Spain) project HEPHACOS S2009/ESP-1473, by the IN2P3(France)-CICyT(Spain) collaboration agreements, by the DFG through grant SFB 634 [J.M.], and by the Helmholtz Association through the Helmholtz Alliance Program, contract HA216/EMMI “Extremes of Density and Temperature: Cosmic Matter in the Laboratory” [J.M.]
ProjectComunidad de Madrid. S2009/ESP-1473/HEPHACOS
Rights© Published under licence by IOP Publishing Ltd.; © Copyright 2011 Elsevier B.V.
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"
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