Effects of New Gravitational Interactions on Neutrinoless Double Beta   Decay
  It has recently been proposed that violations of Lorentz invariance or violations of the equivalence principle can be constrained from the non-observation of neutrinoless double beta decay. We generalize this analysis to all possible new gravitational interactions and discuss briefly the constraints for different cases. 
H.V. Klapdor--Kleingrothaus, H. P\"as and U. Sarkar