Neutrinoless double beta decay and lepton number violation at the LHC

This work was supported by EU Network Grant No. UNILHC PITN-GA-2009-237920 and by the Spanish MICINN Grants No. FPA2011-22975 and No. MULTIDARK CSD2009-00064, by the Generalitat Valenciana (Prometeo/2009/091), by Fondecyt Grants No. 11121557 and No. 1100582, and CONICYT Projects No. 791100017 and No. CONICYT/DFG-648. H. P. was supported by DGF Grant No. PA 803/6-1.