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dc.contributor.author
Dos S. Ferreira, V.
dc.contributor.author
Krmpotic, Francisco
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dc.contributor.author
Barbero, César Alberto
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dc.contributor.author
Samana, Arturo Rodolfo
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dc.date.available
2018-11-23T17:18:49Z
dc.date.issued
2017-10
dc.identifier.citation
Dos S. Ferreira, V.; Krmpotic, Francisco; Barbero, César Alberto; Samana, Arturo Rodolfo; Partial restoration of spin-isospin SU(4) symmetry and the one-quasiparticle random-phase approximation method in double- β decay; American Physical Society; Physical Review C:; 96; 4; 10-2017; 1-17
dc.identifier.issn
2469-9993
dc.identifier.uri
http://hdl.handle.net/11336/65007
dc.description.abstract
The one-quasiparticle random-phase approximation (one-QRPA) method is used to describe simultaneously both double-β-decay modes, giving special attention to the partial restoration of spin-isospin SU(4) symmetry. To implement this restoration and to fix the model parameters, we resort to the energetics of Gamow-Teller resonances and to the minima of the single-β+-decay strengths. This makes the theory predictive regarding the ββ2ν decay, producing the 2ν moments in Ca48, Ge76, Se82, Zr96, Mo100, Te128,130, and Nd150, that are of the same order of magnitude as the experimental ones; however, the agreement with ββ2ν data is only modest. To include contributions coming from induced nuclear weak currents, we extend the ββ0ν-decay formalism employed previously in C. Barbero et al., Nucl. Phys. A 628, 170 (1998)NUPABL0375-947410.1016/S0375-9474(97)00614-3, which is based on the Fourier-Bessel expansion. The numerical results for the ββ0ν moments in the above mentioned nuclei are similar to those obtained in other theoretical studies although smaller on average by ∼40%. We attribute this difference basically to the one-QRPA method, employed here for the first time, instead of the currently used two-QRPA method. The difference is partially due also to the way of carrying out the restoration of the spin-isospin symmetry. It is hard to say which is the best way to make this restoration, since the ββ0ν moments are not experimentally measurable. The recipe proposed here is based on physically robust arguments. The numerical uncertainties in the ββ moments, related to (i) their strong dependence on the residual interaction in the particle-particle channel when evaluated within the QRPA, and (ii) lack of proper knowledge of single-particle energies, have been quantified. It is concluded that the partial restoration of the SU(4) symmetry, generated by the residual interaction, is crucial in the description of the ββ decays, regardless of the nuclear model used.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Physical Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Double Beta Decay
dc.subject
Partial Restoration of Spin-Isospin Su(4) Symmetry
dc.subject
One-Quasiparticle Random-Phase Approximation
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Partial restoration of spin-isospin SU(4) symmetry and the one-quasiparticle random-phase approximation method in double- β decay
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-22T21:59:19Z
dc.journal.volume
96
dc.journal.number
4
dc.journal.pagination
1-17
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Dos S. Ferreira, V.. Universidade Estadual de Santa Cruz, Bahía, Brasil; Brasil. Universidade Federal do Rio de Janeiro; Brasil
dc.description.fil
Fil: Krmpotic, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
dc.description.fil
Fil: Barbero, César Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
dc.description.fil
Fil: Samana, Arturo Rodolfo. Universidade Estadual de Santa Cruz, Bahía, Brasil; Brasil
dc.journal.title
Physical Review C:
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1103/PhysRevC.96.044322
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prc/abstract/10.1103/PhysRevC.96.044322
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