Improved shortrange correlations and 0{nu}{beta}{beta} nuclear matrix elements of {sup 76}Ge and {sup 82}Se
Abstract
We calculate the nuclear matrix elements of the neutrinoless double beta (0{nu}{beta}{beta}) decays of {sup 76}Ge and {sup 82}Se for the light neutrino exchange mechanism. The nuclear wave functions are obtained by using realistic twobody forces within the protonneutron quasiparticle randomphase approximation (pnQRPA). We include the effects that come from the finite size of a nucleon, from the higherorder terms of nucleonic weak currents, and from the nucleonnucleon shortrange correlations. Most importantly, we improve on the presently available calculations by replacing the rudimentary Jastrow shortrange correlations by the more advanced unitary correlation operator method (UCOM). The UCOMcorrected matrix elements turn out to be notably larger in magnitude than the Jastrowcorrected ones. This has drastic consequences for the detectability of 0{nu}{beta}{beta} decay in present and future double beta experiments.
 Authors:

 Department of Physics, University of Jyvaeskylae, P.O. Box 35, FIN40014 Jyvaeskylae (Finland)
 Publication Date:
 OSTI Identifier:
 20995256
 Resource Type:
 Journal Article
 Journal Name:
 Physical Review. C, Nuclear Physics
 Additional Journal Information:
 Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.75.051303; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 05562813
 Country of Publication:
 United States
 Language:
 English
 Subject:
 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CORRELATIONS; GERMANIUM 76; MATRIX ELEMENTS; NEUTRINOS; NEUTRONS; NUCLEAR MATRIX; PROTONS; RANDOM PHASE APPROXIMATION; SELENIUM 82; TWOBODY PROBLEM; VISIBLE RADIATION; WAVE FUNCTIONS
Citation Formats
Kortelainen, Markus, and Suhonen, Jouni. Improved shortrange correlations and 0{nu}{beta}{beta} nuclear matrix elements of {sup 76}Ge and {sup 82}Se. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVC.75.051303.
Kortelainen, Markus, & Suhonen, Jouni. Improved shortrange correlations and 0{nu}{beta}{beta} nuclear matrix elements of {sup 76}Ge and {sup 82}Se. United States. doi:10.1103/PHYSREVC.75.051303.
Kortelainen, Markus, and Suhonen, Jouni. Tue .
"Improved shortrange correlations and 0{nu}{beta}{beta} nuclear matrix elements of {sup 76}Ge and {sup 82}Se". United States. doi:10.1103/PHYSREVC.75.051303.
@article{osti_20995256,
title = {Improved shortrange correlations and 0{nu}{beta}{beta} nuclear matrix elements of {sup 76}Ge and {sup 82}Se},
author = {Kortelainen, Markus and Suhonen, Jouni},
abstractNote = {We calculate the nuclear matrix elements of the neutrinoless double beta (0{nu}{beta}{beta}) decays of {sup 76}Ge and {sup 82}Se for the light neutrino exchange mechanism. The nuclear wave functions are obtained by using realistic twobody forces within the protonneutron quasiparticle randomphase approximation (pnQRPA). We include the effects that come from the finite size of a nucleon, from the higherorder terms of nucleonic weak currents, and from the nucleonnucleon shortrange correlations. Most importantly, we improve on the presently available calculations by replacing the rudimentary Jastrow shortrange correlations by the more advanced unitary correlation operator method (UCOM). The UCOMcorrected matrix elements turn out to be notably larger in magnitude than the Jastrowcorrected ones. This has drastic consequences for the detectability of 0{nu}{beta}{beta} decay in present and future double beta experiments.},
doi = {10.1103/PHYSREVC.75.051303},
journal = {Physical Review. C, Nuclear Physics},
issn = {05562813},
number = 5,
volume = 75,
place = {United States},
year = {2007},
month = {5}
}