Limits on Majorana Neutrinos from Recent Experimental Data
  We investigate the sensitivity of some weak processes to the simplest extension of the Standard Model with Majorana neutrinos mixing in the leptonic sector. Values for mixing angles and masses compatible with several experimental accelerator data and the most recent neutrinoless double--$\beta$ decay limit were found. 
O. L. G. Peres, L. P. Freitas and R. Zukanovich Funchal