  Weak interaction in nuclei represents a well-known venue for testing many of
the fundamental symmetries of the Standard Model. In particular, neutrinoless
double-beta decay offers the possibility to test Beyond Standard Model theories
predicting that neutrinos are Majorana fermions and the lepton number
conservation is violated. This paper focuses on an effective field theory
approach to neutrinoless double-beta decay for extracting information regarding
the properties of the Beyond Standard Model Lagrangian responsible for this
process. We use shell model nuclear matrix elements and the latest experimental
lower limits for the half-lives to extract the lepton number violating
parameters of five nuclei of experimental interest, and lower limits for the
energy scales of the new physics.
