CERN Accelerating science

Leading order Feynman diagram for the production and cascade decay of a \PZpr resonance to a four-lepton final state.

The \mfl spectrum for the combination of the five studied channels. The points with vertical bars represent the data and the associated statistical uncertainties; the histograms represent the expectations from SM processes; ``Top quark'' denotes the sum of the events for \ttbar, $\PQt\PW$, $\ttbar\cPZ$~processes; ``EW'' denotes the sum of the events from $\PW\PW, \PW\cPZ, \PW\PW\gamma, \PW\PW\cPZ, \PW\cPZ\cPZ$, and $\cPZ\cPZ\cPZ$ processes. The inset shows the expectation from the benchmark model for a signal at \mZp = 2.5\TeV with $\mphi = 50\GeV$.

The 95\% CL upper limit on the cross section times branching fraction as a function of \mfl for the combination of the five channels. The shaded green (yellow) band indicates the one (two) sigma uncertainty in the expected limits. The blue dashed line represents the theoretical predictions for the benchmark model~\cite{HSLee:FourLepton} for $\mphi = 50\GeV$.

The 95\% CL upper limit on the cross section times branching fraction as a function of \mfl for the combination of the five channels: full mass range (\cmsLeft) and expanded view of the low mass region (\cmsRight). The shaded green (yellow) band indicates the one (two) sigma uncertainty in the expected limits. The blue dashed line represents the theoretical predictions for the benchmark model~\cite{HSLee:FourLepton} for $\mphi = 50\GeV$.

The 95\% CL upper limit on the cross section times branching fraction as a function of \mfl for the combination of the five channels: full mass range (\cmsLeft) and expanded view of the low mass region (\cmsRight). The shaded green (yellow) band indicates the one (two) sigma uncertainty in the expected limits. The blue dashed line represents the theoretical predictions for the benchmark model~\cite{HSLee:FourLepton} for $\mphi = 50\GeV$.