Neutrinoless double-beta decay and double-electron capture

Details Neutrinoless double-beta decay and double-electron capture Neutrinoless double-beta decay and double-electron capture

Apr 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011prpnp..66..446s&link_type=abstract

Progress in Particle and Nuclear Physics, Volume 66, Issue 2, p. 446-451.

Physics

Nuclear Physics

3

Scientific paper

The fundamental importance of searching for neutrinoless double-beta decay is widely recognized. Observation of the decay would tell us that the total lepton number is not conserved and that, consequently, neutrinos are massive Majorana fermions. The same statement could be made in the case of observing neutrinoless double-electron capture. We address the question of the sensitivity of the 0νɛɛ decay to the effective mass of the Majorana neutrino. According to our estimates, in the case of 152Gd and 164Er the sensitivity can be comparable to the favored 0νββ decays of nuclei. The main uncertainty in the prediction of half-lives of the 0νɛɛ decay stems from the lack of sufficient precision in measuring the mass difference between the parent and daughter atoms. More accurate measurements can be accomplished using the modern high-precision ion traps.

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