  We study the production of heavy neutrinos at the Large Hadron Collider (LHC)
through the dominant s-channel production mode as well as the vector boson
fusion (VBF) process. We consider the TeV scale minimal linear seesaw model
containing two heavy singlets with opposite lepton number. This model is fully
reconstructible from oscillation data apart from an overall normalization
constant which can be constrained from meta-stability of the electroweak vacuum
and bounds coming from lepton flavor violation (LFV) searches. Dirac nature of
heavy neutrinos in this model implies suppression of the conventional
same-sign-dilepton signal at the LHC. We analyze the collider signatures with
tri-lepton final state and missing transverse energy as well as VBF type
signals which are characterized by two additional forward tagged jets. Our
investigation reveals that due to stringent constraints on light-heavy mixing
coming from LFV and meta-stability bounds, the model can be explored only for
light to moderate mass range of heavy neutrinos. We also note that in case of a
positive signal, flavor counting of the final tri-lepton channel can give
information about the mass hierarchy of the light neutrinos.
