第十二届中国 LHC 物理会议（CLHCP2026）

This talk presents an overview of recent measurements on the Higgs boson self-coupling from the ATLAS and CMS experiments. It also discusses their theoretical interpretation and the projected sensitivity at the HL-LHC.

Rare and exotic decays of the Higgs boson offer a unique window into phenomena beyond the Standard Model, probing potential new interactions, hidden sectors, and extended Higgs sectors.This talk will review the latest searches for rare and non-standard Higgs decays performed by the ATLAS and CMS experiments.

On-shell amplitudes reveal the independent interactions of effective field theory (EFT), complementing redundant Lagrangian descriptions. This review follows the on-shell approach from kinematics, factorization, recursion, and soft constraints to nonredundant massless and massive amplitude bases. We discuss harmonic analysis, Young tableaux, and massive spinor-helicity methods, emphasizing...