Rephasing-invariant CP violating parameters with majorana neutrinos - art.no. 076005

We analyze the dependence of the squared amplitudes on the rephasing-invari ant CP-violating parameters of the lepton sector, involving Majorana neutri nos, for various lepton-conserving and lepton-violating processes. We analy ze the conditions under which the CP-violating effects in such processes va nish, in terms of the minimal set of rephasing invariants, giving special a ttention to the dependence on the extra CP-violating parameters that are du e to the Majorana nature of the neutrinos.