  We study discovery prospects for long-lived sterile neutrinos at the LHC with
multitrack displaced vertices, with masses below the electroweak scale. We
reinterpret current displaced vertex searches making use of publicly available,
parametrized selection efficiencies for modeling the detector response to
displaced vertices. We focus on production of right-handed $W_{R}$ bosons and
neutrinos $N$ in a left-right symmetric model, and find poor sensitivity. After
proposing a different trigger strategy (considering the prompt lepton
accompanying the neutrino displaced vertex) and optimized cuts in the invariant
mass and track multiplicity of the vertex, we find that the LHC with
$\sqrt{s}=13$ TeV and 300 fb$^{-1}$ is able to probe sterile neutrino masses
between $10\hspace{0.1cm}\mbox{GeV}<m_{N}<20$ GeV (for a right-handed gauge
boson mass of $2\hspace{0.1cm}\mbox{TeV}<m_{W_{R}}<3.5$ TeV). To probe higher
masses up to $m_{N}\sim 30$ GeV and $m_{W_{R}}<5$ TeV, 3000 fb$^{-1}$ will be
needed. This work joins other efforts in motivating dedicated experimental
searches to target this low sterile neutrino mass region.
