Sensitivity of accelerator-based neutrino experiments to neutrino-dark matter interaction: Elko as a viable dark matter candidate

We analyze the potential of accelerator-based neutrino experiments, such as the Deep Underground Neutrino Experiment Near Detector, to constrain a five dimensional operator mediating a beyond standard model interaction between mass dimension one fermion fields, labeled elko, and neutrinos. We identify the parameter space where the fermion with mass dimension one is a viable dark matter candidate.