Abstract: Light mediators are a type of well-motivated particles. Their masses and couplings can vary in different theories. In this talk, I investigate several new experiments mainly motivated by SM that are sensitive to BSM light mediators, with the example of dark photon and neutrino self-interaction mediator. We found that the MUonE, Hyper-K, IceCube, and GRAND experiments are sensitive to these mediators in a wide range of parameter space.