Probing TeV Scale Seesaw and Leptogenesis at the LHC

If the seesaw mechanism is responsible for neutrino masses, an Important question for physics beyond the standard model is the scale of B-L. symmetry breaking responsible for the right-handed neutrino masses Assuming this scale to be in the TeV range makes it accessible at the LHC Here we discuss the compatibility of low-scale B-L symmetry with leptogenesis as the mechanism for understanding the origin of matter, and whether a direct collider probe of this mechanism is possible We find that successful leptogenesis implies a lower bound M-Z' >= 2 6 TeV, which is in the LHC reach Moreover, it may be possible to directly probe leptogenesis via a difference in the number of positive and negative like-sign dilepton events originating from right-handed neutrino decays