Speaker
Xin Chen
(Tsinghua University)
Description
Axions are hypothetical particles that may solve the strong CP problem and act as a dark matter candidate. FASER is able to search for axion-like-particles (ALPs) that couple to both photons and weak gauge bosons in more general models. These ALPs are produced at pp collisions in ATLAS through b-hadron decays, and their decay products are identified as high energy photons in the electromagnetic calorimeter of FASER, located at about 480 m far apart from ATLAS. ALPs mass between 50 and 500 MeV and ALP-W-W coupling between 10-5 and 10-3 GeV-1 can be probed, reaching a previously unexplored region of parameter space. The search result based on 57.7 fb−1 of initial LHC Run-3 data will be presented in this talk.
