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Shell model nuclear matrix elements for double. beta. decay

Journal Article · · Phys. Rev. C; (United States)
; ;
The nuclear matrix elements for the /sup 76/Ge..-->../sup 76/Se, /sup 80/Se..-->../sup 80/Kr, /sup 82/Se..-->../sup 82/Kr, and /sup 86/Kr..-->../sup 86/Sr double ..beta.. decay were calculated in a shell-model space consisting of the 0g/sub 9/2, 1p/sub 1/2, 1p/sub 3/2, and 0f/sub 5/2 orbitals for both protons and neutrons, and using an effective interaction that contained second-order corrections. For light intermediate neutrinos our results are in agreement with the previously available Los Alamos matrix elements. We have, however, obtained nuclear matrix elements relevant for intermediate heavy neutrinos, Higgs bosons, and supersymmetric particles. Using these matrix elements and the available experimental limits for neutrinoless double ..beta.. decay, we obtained the following mass limits: )vertreverse arrowbar))vertreverse arrowbar)<1.1 eV, (<1M/sub N/>)/sup -1/>1.0 x 10/sup 5/ GeV for the light left-handed and heavy right-handed neutrinos, the squark, and the selectron, respectively. We also obtained the limits )vertreverse arrowbar)g/sub ee/)vertreverse arrowbar)<4 x 10/sup -5/ and eta<1.3 x 10/sup -6/ for the majoron neutrino coupling and the admixture of right-handed currents, respectively
Research Organization:
National Research Center of Physical Sciences ''Demokritos,'' GR-153 10 Aghia Paraskevi, Greece
OSTI ID:
5259772
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 37:3; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

653005* -- Nuclear Theory-- Radioactive Decay
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
BETA DECAY
BETA-MINUS DECAY
DECAY
DOUBLE BETA DECAY
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
GERMANIUM 76
GERMANIUM ISOTOPES
HIGGS BOSONS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KRYPTON 80
KRYPTON 82
KRYPTON 86
KRYPTON ISOTOPES
LEPTONS
LIFETIME
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATRIX ELEMENTS
NEUTRINOS
NUCLEAR MODELS
NUCLEI
POSTULATED PARTICLES
QUASI PARTICLES
RADIOISOTOPES
RANDOM PHASE APPROXIMATION
SELENIUM 76
SELENIUM 80
SELENIUM 82
SELENIUM ISOTOPES
SHELL MODELS
STABLE ISOTOPES
STRONTIUM 86
STRONTIUM ISOTOPES
SUPERSYMMETRY
SYMMETRY