Shell model study on the possibility of using an effective field theory for disentangling several contributions to the neutrinoless double-beta decay

Understand

Neutrinoless double-beta decay represents the most promising approach for revealing some of the most important, yet-unknown, properties of neutrinos related to their absolute masses and their nature.

• This transition involves beyond standard model theories that predict the violation of the lepton number conservation by two units.
• There is no experimental confirmation yet for this decay, but new experiments have set lower-limits for the associated half-lives in the case of several isotopes.
• Using an effective field theory that describes this transition, we calculate half-life ratios for five experimentally interesting isotopes in the case of 12 lepton number violating couplings.