Neutrino Detection without Neutrino Detectors: Discovering Collider Neutrinos at FASER with Electronic Signals Only

Abstract

The detection of collider neutrinos will provide new insights about neutrino production, propagation, and interactions at TeV energies, the highest human-made energies ever observed. During Run 3 of the LHC, the FASER experiment is expected to detect roughly 10 4 collider neutrinos using its emulsion-based neutrino detector FASERν. In this study, we show that, even without processing the emulsion data, low-level input provided by the electronic detector components of FASER and FASERν will be able to establish a 5σ discovery of collider neutrinos with as little as 5 fb −1 of integrated luminosity. These results foreshadow the possible early discovery of collider neutrinos in LHC Run 3.

Dark Sector Studies with Neutrino Beams

“…A magnetic field of 0.55 T is used to bend the tracks of charged products of LLP decays and the end calorimeter allows for measuring electromagnetic energy. Both FASER and its proposed successor FASER2 [132] to operate during the HL-LHC era have a great potential for finding long-lived beyond the Standard Model particles [136], while high-energy CC neutrino interactions can also be detected based on their interactions in front of the spectrometer [137].…”