the photons from the FSR uses the same procedure as described in Ref. [@Chatrchyan:2013mxa].

In the analysis, the presence of jets is only used to determine the differential cross section measurements as a function of jet-related observables. Jets are selected if they satisfy $\pt \ge 30\GeV$ and $|\eta| \le 4.7$, and are required to be separated from the lepton candidates and from identified FSR photons by $\Delta R \equiv \sqrt{\smash[b]{(\Delta \eta)^{2}+(\Delta \phi)^{2}}} > 0.5$ (where $\phi$ is the azimuthal angle in radians) [@Chatrchyan:2013mxa].

After the event selection is applied, the dominant contribution to the irreducible background for the ${\ensuremath{\PH \to 4\ell}\xspace}$ process originates from the $\PZ \PZ$ production via the $\PQq \PAQq$ annihilation, while the subdominant contribution arises from the $\PZ \PZ$ production via gluon fusion. In those processes, at least one of the intermediate $\PZ$ bosons is not on-shell. The reducible backgrounds mainly arise from the processes where parts of intrinsic jet activity are misidentified as an electron or a muon, such as: production of $\PZ$ boson in association with jets, production of a $\PZ \PW$ boson pair in association with jets, and the $\ttbar$ pair production. Hereafter, this background is denoted as $\PZ+\mathrm{X}$. The other background processes have 