Speaker
haotian Liu
Description
This talk will present a key advancement from the ATLAS experiment in probing the rare decay of the Higgs boson to a pair of muons (H→μμ). By analysing the new proton-proton collision data from LHC Run 3 (2022-2024) and combining it with Run 2 data, incorporating several technical improvements, we have performed the most sensitive combined measurement to date. The result provides the first evidence for the H→μμ decay with a significance of 3.4σ by ATLAS, marking a significant milestone in directly probing the Yukawa coupling between the Higgs boson and second-generation fermions.