Is leptogenesis falsifiable at LHC?

It is well known that the leptogenesis mechanism offers an attractive possibility to explain the baryon asymmetry of the universe. Its particular robustness however comes with one major difficulty: it will be very hard if not impossible to test experimentally in a foreseeable future, as most of the mechanics typically takes place at high energy or results from suppressed interactions, without unavoidable low-energy implications. An alternate approach is taken by asking: can it, be at least falsified? We show that, possible discoveries at current and future colliders, most, notably that, of right-handed gauge interactions, would indeed forbid at least the canonical leptogenesis mechanisms, namely those based on right-handed neutrino decay. General lower bounds for successful leptogenesis on the mass ;of the right-handed gauge boson W-R are given. Other possibilities to falsify leptogenesis, including from the observation of a Z', are also considered.