HAL : in2p3-00247898, version 1
 arXiv : 0801.3760
 Nuclear Physics A 818 (2009) 139-151
 Disassembling the Nuclear Matrix Elements of the Neutrinoless double beta Decay
 J. Menéndez1, A. Poves1, E. Caurier2, F. Nowacki2
 (2009)
 In this article we analyze the nuclear matrix elements (NME) of the neutrinoless double beta decays of the nuclei 48-Ca, 76-Ge, 82-Se, 124-Sn, 130-Te and 136-Xe in the framework of the Interacting Shell Model (ISM). We study the relative value of the different contributions to them, such as higher order terms in the nuclear current, finite nuclear size effects and short range correlations, as well as their evolution with the maximum seniority permitted in the wave functions. We discuss also the build-up of the NME's as a function of the distance between the decaying neutrons. We calculate the decays to final 0+ first excited states and find that these decays are at least 25 times more supressed with respect to the ground state to ground state transition. Finally we study the interplay between pairing and quadrupole correlations in the neutrinoless double-beta decay NME's.
 Thème(s) : Physique/Physique Nucléaire Théorique
 Mot(s)-clé(s) : Shell Model – Double beta decay matrix elements
 Lien vers le texte intégral : http://fr.arXiv.org/abs/0801.3760
 in2p3-00247898, version 1 http://hal.in2p3.fr/in2p3-00247898 oai:hal.in2p3.fr:in2p3-00247898 Contributeur : Béatrice Forrler <> Déposé pour le compte de : Etienne Caurier <> Soumis le : Vendredi 8 Février 2008, 10:14:50 Dernière modification le : Lundi 16 Mars 2009, 09:14:00