2019 July 21
I present a proposal to search for long lived particles in heavy ion collisions using heavy neutrinos as an example. In comparison to proton collisions heavy ion collisions allow to lower the trigger thresholds significantly. On the other hand, there has been an interested to operate the LHC using ions lighter than lead. We have shown that searches in intermediate ion collisions can have a higher significance than in proton collision if one assumes equal running time.