Speaker
Noshin Tarannum
(Universite de Geneve (CH))
Description
FASER, an experiment at the LHC, aims to search for light, weakly interacting particles produced in proton-proton collisions at the ATLAS interaction point and travel in the far-forward direction. First search of detecting a light, long-lived particle decaying into photon pairs, using 2022 and 2023 collision data will be reported. Targeting axion-like particles (ALPs) primarily coupling to weak gauge bosons, the analysis identifies one event against an expected background of $0.42 \pm 0.38$ events, largely due to neutrino interactions. This yields world-leading constraints on ALPs of masses up to $300$ MeV and coupling strengths of around $10^{-4}$ GeV$^{-1}$, exploring previously unexplored region of parameter space.
Author
Noshin Tarannum
(Universite de Geneve (CH))
