Renormalized quasiparticle random phase approximation and double beta decay: A critical analysis of double Fermi transitions
نویسندگان
چکیده
منابع مشابه
Renormalized QRPA and double beta decay: a critical analysis of double Fermi transitions
The proton-neutron monopole Lipkin model, which exhibits some properties which are relevant for those double beta decay (ββ) transitions mediated by the Fermi matrix elements, is solved exactly in the proton-neutron two-quasiparticle space. The exact results are compared with the ones obtained by using the Quasiparticle Random Phase (QRPA) and renormalized QRPA (RQRPA) approaches. It is shown t...
متن کاملRenormalized QRPA and double beta decay: a critical analysis
The proton-neutron monopole Lipkin model, which exhibites the properties which are relevant for the description of the double beta decay (ββ) transitions, is solved exactly. The exact results are compared with the ones obtained by using the Quasiparticle Random Phase (QRPA) and renormalized QRPA (RQRPA) approaches. It is shown that the RQRPA violates the Ikeda Sum Rule and that this violation m...
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The first, to our knowledge, calculation of neutrinoless double beta decay (0νββ-decay ) matrix elements within the self-consistent renormalized Quasiparticle Random Phase Approximation (SRQRPA) is presented. The contribution from the momentum-dependent induced nucleon currents to 0νββdecay amplitude is taken into account. A detailed nuclear structure study includes the discussion of the sensit...
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Simple formulae for the 0+ → 0+ double beta decay matrix elements, as a function of the particle-particle strength gpp, have been designed within the quasiparticle random phase approximation. The 2ν amplitude is a bilinear function of gpp, and all 0ν moments behave as ratios of a linear function and the square root of another linear function of gpp. It is suggested that these results are of gen...
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We show how the longstanding problem of the collapse of the charge-exchange QRPA near the physical value of the force strength can be circumvented. This is done by including the effect of ground state correlations into the QRPA equations of motion. The corresponding formalism, called renormalized QRPA, is briefly outlined and its consequences are discussed in the framework of a schematic model ...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 1996
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.54.1976