The goal of the P348

This is a fixed-target experiment at the CERN SPS utilizing the active beam dump combined with the  missing energy approach for the searches  of   invisible decays of dark photons  (A') with the mixing strength 10-5 < ε < 10-3 and masses MA' < 100 MeV,  invisible decays of (pseudo)scalar mesons, in particular K_S ,  K_L -> invisible, and hadron and muon interactions resulting in invisible final states due to production of new penetrating particles. 

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