FASER: ForwArd Search ExpeRiment at the LHC

Understand

FASER, the ForwArd Search ExpeRiment, is a proposed experiment dedicated to searching for light, extremely weakly-interacting particles at the LHC.

• Such particles may be produced in the LHC's high-energy collisions in large numbers in the far-forward region and then travel long distances through concrete and rock without interacting.
• They may then decay to visible particles in FASER, which is placed 480 m downstream of the ATLAS interaction point.
• In this work, we describe the FASER program.