The FASER experiment: Studying neutrinos and searching for new particles at the far forward region of the LHC

	The FASER experiment is a new experiment at the Large Hadron Collier (LHC). The experiment consists of two pillars, FASER to search for light, weaklyinteracting new particles, and FASERnu to study neutrinos for the first time with a collider. A copious number of particles, including neutrinos and possibly hypothetical dark particles, would be produced following p-p collisions at the LHC. Most of them are emitted in far forward direction, where the conventional LHC experiments do not have a coverage. In order to detect and study these particles, the FASER collaboration will place a series of particle detectors at the 480 m downstream of the ATLAS interaction point, on-axis of the beam collisions. FASER will take data in Run 3 of the LHC operation (2022-2024, ~150 fb-1), and collect O(104 ) neutrino charged-current interactions including three neutrino flavors at TeV energy scale, allowing a study of neutrinos in an currently unexplored energy regime. And also, dark photon and/or axion-like particles (ALPs) will be searched for. Most of the detectors have been installed and being commissioned towards the data taking in next year. In this seminar, I will give the overview and physics sensitivities of the FASER experiment, also the first neutrino interaction candidates from a pilot run in 2018 (very recently published on the web arXiv:2105.06197).