1998/10/27 by C. Barbero, F. Krmpotić, A. Mariano +1 · 1 citation
Physics and Astronomy · #Neutrino Physics Research #Nuclear physics research studies #Particle physics theoretical and experimental studies #hep-ph #nucl-th
paper · pdf · doi:10.1016/s0370-2693(98)01391-4
published as Phys.Lett. B445 (1999) 249-253 · 8 pages, latex, 1ps figure, to appear in Phys. Lett. B
arxiv created 1998/10/27 · openalex publication_date 1999/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have extended the formalism for the two-neutrino double beta decay by including the weak-magnetism term, as well as other second-forbidden corrections. The weak magnetism diminishes the calculated half-lives in ∼ 10%, independently of the nuclear structure. Numerical computations were performed within the pn-QRPA, for 76Ge, 82Se, 100 Mo, 128Te and 130Te nuclei. No one of the second-forbidden corrections modifies significantly the spectrum shapes. The total reduction in the calculated half lives varies from 6% up to 32%, and strongly depend on the nuclear interaction in the particle-particle S=1,T=0 channel. We conclude that the higher order effects in the weak Hamiltonian would hardly be observed in the two-neutrino double beta experiments.