ALP searches at the LHC: FASER as a light-shining-through-walls experiment
Felix Kling, Pablo Quílez
Abstract
We propose the use of FASER as a light-shining-through-walls experiment to search for axions and axionlike particles (ALPs). LHC collisions generate a high intensity and high energy photon flux in the forward direction which can oscillate into ALPs in the magnetic fields that are used to confine the beam. These $\text{ALPs}$ then pass through about 100 m of rock before reaching the magnetic fields of FASER, where they can convert back into photons and be detected by an electromagnetic calorimeter. In the next years, FASER and its successor FASER2 at the Forward Physics Facility will be able to explore regions of the ALP parameter space inaccessible by other laboratory-based experiments.
Topics & Concepts
PhysicsLarge Hadron ColliderAxionPhotonParticle physicsCalorimeter (particle physics)Nuclear physicsPhysics beyond the Standard ModelSuccessor cardinalOpticsDark matterDetectorMathematicsMathematical analysisDark Matter and Cosmic PhenomenaParticle physics theoretical and experimental studiesAstrophysics and Cosmic Phenomena