HAL : in2p3-00247898, version 1
 arXiv : 0801.3760
 Disassembling the Nuclear Matrix Elements of the Neutrinoless double beta DecayMenéndez J., Poves A., Caurier E., Nowacki F.Nuclear Physics A 818 (2009) 139-151 - http://hal.in2p3.fr/in2p3-00247898
Physique/Physique Nucléaire Théorique
Disassembling the Nuclear Matrix Elements of the Neutrinoless double beta Decay
J. Menéndez1, A. Poves1, E. Caurier2, F. Nowacki2
 1 : Departamento de Fisica Teorica and IFT-UAM/CSIC Universidad Autónoma de Madrid E-28049 Madrid Espagne 2 : DRS-IPHC - Département Recherches Subatomiques CNRS : UMR7178 – IN2P3 – Université Louis Pasteur - Strasbourg I 23 rue du Loess - BP28 67037 Strasbourg cedex 2 France
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.

Articles dans des revues avec comité de lecture
2009
 Nuclear Physics A (Nucl. Phys. A) Publisher Elsevier ISSN 0375-9474
818
139-151