Search for GeV-Scale Sterile Neutrinos Responsible for Active Neutrino Oscillations and Baryon Asymmetry of the Universe

Figure 8

Schematic illustration of a proton beam dump experiment on search for 𝐷_𝑠→𝜇𝑁,𝑁→𝜇𝜋 decay chain: charm mesons 𝐷_𝑠 generated by the proton beam in the target (𝑇) produce a flux of high energy 𝑁’s through the 𝑈_𝜇𝑁 mixing in the decay 𝐷_𝑠→𝜇𝜈_𝜇, which penetrate the downstream shielding and decay into 𝜇𝜋 pair in a neutrino decay volume (DV). The same setup can be used to search for the process 𝑁→𝜇𝑒𝜈. See text.