Enhanced sensitivity to the $H \to Zγ\to \ell^+\ell^-γ$ decay at the LHC using machine learning and novel kinematic observables
At LHC energies, the Drell--Yan ($Z/γ^{*}$) processes have a substantially large cross section. Their di-lepton ($\ell^+\ell^-$) final state contributes significantly to many resonant signal regions, making them one of the dominant backgrounds in numerous physics analyses. The study focuses on improving the discrimination and...