Speaker
Description
FASER, an experiment at the LHC, was designed to explore the existence of light, weakly interacting particles that are generated in proton-proton collisions at the ATLAS interaction point and travel in the far-forward direction. The initial data analysis focused on two searches: the decay of dark photons into an electron-positron pair and the charged-current interaction of muon neutrinos leading to the production of muons. The outcomes of these searches during LHC Run 3 data, will be presented. For the dark photon analysis, no events were observed in an almost background-free analysis, resulting in world-leading constraints on dark photons with couplings in the range of $\epsilon \sim 10^{-5} - 10^{-4}$ and masses in the range of $\sim 10$ MeV - $100$ MeV. In the neutrino analysis, we identified $153^{+12}_{-13}$ neutrino interactions with a significance of 16 standard deviations above the background-only hypothesis.
