Improved short-range correlations and 0{nu}{beta}{beta} nuclear matrix elements of {sup 76}Ge and {sup 82}Se

Journal Article · Tue May 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.051303· OSTI ID:20995256

Kortelainen, Markus; Suhonen, Jouni ^[1]

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1. Department of Physics, University of Jyvaeskylae, P.O. Box 35, FIN-40014 Jyvaeskylae (Finland)

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.

• OSTI ID: 20995256
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

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