Nuclear Structure Aspects of the Neutrinoless Double Beta Decay

por Alfredo Poves (IFT, UAM-CSIC)

martes 29 abr. 2008 10:30 → 11:30 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

In this seminar I will analyze the nuclear structure aspects of the 0nu double beta decay nuclear matrix elements (NME) in the framework of the Interacting Shell Model. I will present results for the decays of 48Ca, 76Ge, 124Sn, 128Te, 130Te, and 136Xe, using improved effective interactions and valence spaces. �I will submit that the �NME's are extremely sensitive to the structure of the wave functions in terms of pairs of nucleons coupled to angular momentum zero. This point of view gives back the due protagonism in this process to the pairinginteraction, the interaction which is responsible for the very existence of double beta decay emitters. �I will argue that low seniority approximations, such as the Quasiparticle RPA in an spherical basis, tend to overestimate the values of the NME's. WARNING: This seminar will be held in the IFIC sala de reunions, LAB hall (La Trobada room), at 10:45.