Exploring dark sectors FASER: ForwArd Search ExpeRiment at the LHC

New physics has traditionally been expected in the high pT region at high energy collider experiments If new particles are light and weakly coupled however this focus may be completely misguided: light particles are typically highly concentrated within a few mrad of the beam line allowing sensitive searches with small detectors and even extremely weakly coupled particles may be produced in large numbers there In this talk I will discuss the status of FASER ForwArd Search ExpeRiment at the LHC a small and inexpensive detector which will be placed 480 m downstream of the ATLAS interaction point in the very forward region Operating concurrently with the LHC FASER will have a new physics discovery potential in a swath of currently unconstrained parameter space which is competitive or complementary to much larger proposed experiments I will survey recent theoretical work as well several experimental developments