High Energy Neutrino Studies in the forward direction with FASER experiment at the LHC

Abstract

The FASER experiment studies the neutral decay products from LHC collision of 13.6 TeV centre of mass energy at 480m distant away. There could be Beyond Standard Model (BSM) particles such like dark photons or axion like particles etc.., and also high energy neutrinos. The neutrino target is an Emulsion Cloud Chamber with tungsten plates who can measure all three neutrino flavours with clear separation. Recently, FASER has measured the muon and electron neutrino cross-section with a nucleon as $ \sigma(\nu_{e} + N) = 1.2^{+0.8}_{-0.7}\times 10^{-38} cm^{2}/GeV$ and $ \sigma(\nu_{\mu} + N) = 0.5 \pm{0.2}\times 10^{-38} cm^{2}/GeV$ in the unexplored energy region of a few hundred GeV to a few TeV so far.