Theoretical challenges in Double Beta Decay

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Stoica, Sabin^1

Horia Hulubei Foundation, P.O. Box MG12, Bucharest-Magurele

077125, Romania^1

关键词: Accurate calculations;    Decay mode;    Double beta decay;    Lepton number;    Majorana particles;    Nuclear matrix elements;    Phase spaces;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/6/062056/pdf
DOI  :  10.1088/1742-6596/718/6/062056

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The study of the double beta decay (DBD), particularly the neutrino less decay mode, is of great interest for testing the lepton number conservation (LNC) and getting information about neutrino properties, as the neutrinos character (Dirac or Majorana particles?), their absolute mass and hierarchy, etc. [1]-[2]. To make predictions of the DBD lifetimes and put constraints on the neutrino parameters, one needs accurate calculations of the nuclear matrix elements (NME) and phase space factors (PSF) entering the DBD lifetime expressions. In this paper I present recent calculations of these quantities, performed with approaches developed by our group. Then, I compare the theoretical predictions for the two-neutrino (2v) DBD lifetimes, for the most experimentally interesting nuclei, with the experimental ones, and comment on the reliability of the neutrinoless (0v) DBD calculations.