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Title: Improved short-range 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 two-body forces within the proton-neutron quasiparticle random-phase approximation (pnQRPA). We include the effects that come from the finite size of a nucleon, from the higher-order terms of nucleonic weak currents, and from the nucleon-nucleon short-range correlations. Most importantly, we improve on the presently available calculations by replacing the rudimentary Jastrow short-range correlations by the more advanced unitary correlation operator method (UCOM). The UCOM-corrected matrix elements turn out to be notably larger in magnitude than the Jastrow-corrected ones. This has drastic consequences for the detectability of 0{nu}{beta}{beta} decay in present and future double beta experiments.

Authors:
;  [1]
  1. Department of Physics, University of Jyvaeskylae, P.O. Box 35, FIN-40014 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 0556-2813
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; TWO-BODY PROBLEM; VISIBLE RADIATION; WAVE FUNCTIONS

Citation Formats

Kortelainen, Markus, and Suhonen, Jouni. Improved short-range 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 short-range 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 short-range 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 short-range 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 two-body forces within the proton-neutron quasiparticle random-phase approximation (pnQRPA). We include the effects that come from the finite size of a nucleon, from the higher-order terms of nucleonic weak currents, and from the nucleon-nucleon short-range correlations. Most importantly, we improve on the presently available calculations by replacing the rudimentary Jastrow short-range correlations by the more advanced unitary correlation operator method (UCOM). The UCOM-corrected matrix elements turn out to be notably larger in magnitude than the Jastrow-corrected 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 = {0556-2813},
number = 5,
volume = 75,
place = {United States},
year = {2007},
month = {5}
}