Left-right symmetric models at the high-intensity frontier

We study constraints on left-right symmetric models from searches of semileptonic decays of D, Dₛ, and B mesons, mediated by heavy neutrinos N with masses mN~GeV that go on their mass shell leading to a resonant enhancement of the rates. Using these processes, we examine, as a function of mN and M_WR, the physics reach of the recently proposed high-intensity beam dump experiment SHiP, which is expected to produce a large sample of Dₛ mesons. We compare these results with the corresponding reach of neutrinoless double beta decay experiments, as well as like-sign dilepton searches with displaced vertices at the LHC. We conclude that the SHiP experiment has clear advantages in probing the left-right symmetric models for heavy neutrinos in the GeV mass range.