  We study displaced signatures of sneutrino pairs potentially emerging at the
Large Hadron Collider (LHC) in a Next-to-Minimal Supersymmetric Standard Model
supplemented with right-handed neutrinos triggering a Type-I seesaw mechanism.
We show how such signatures can be established through a heavy Higgs portal in
the presence of both leptonic and hadronic decays of the sneutrinos. We finally
illustrate how the Yukawa parameters of the latter can be extracted from
fitting kinematical quantities pertaining to the corresponding two displaced
vertices, thereby characterising the dynamics of the underlying mechanism of
neutrino mass generation. We show our numerical results for the case of both
the current and High-Luminosity LHC.
