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Advances in High Energy Physics
Volume 2014 (2014), Article ID 724315, 7 pages
http://dx.doi.org/10.1155/2014/724315
Research Article

Constraints on Heavy Neutrino and SUSY Parameters Derived from the Study of Neutrinoless Double Beta Decay

1Horia Hulubei Foundation, P.O. Box MG-12, Magurele, Bucharest 077125, Romania
2Horia Hulubei National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, Magurele, Bucharest 077125, Romania

Received 4 April 2014; Accepted 26 May 2014; Published 16 June 2014

Academic Editor: Theocharis Kosmas

Copyright © 2014 Andrei Neacsu and Sabin Stoica. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.

Abstract

New constraints on the lepton number violating (LNV) parameters are derived from the analysis of the neutrinoless double beta ( ) decay in the hypothesis that this process would occur through the exchange of heavy neutrinos and/or SUSY particles. For derivation, we use new values of both phase space factors (PSFs) and nuclear matrix elements (NMEs) calculated with numerical codes developed recently, as well as the most recent experimental lifetimes. The NMEs are computed with a shell model (ShM) code for , , and nuclei, while at present similar ShM results are available only for the first nucleus. We compare our results with similar ones from literature, obtained with ShM, QRPA, and IBM-2 methods, and conclude that more results are needed for a relevant analysis on the validity of NMEs associated with these decay mechanisms.