Search for a two-Higgs-boson doublet using a simplified model in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV

Understand

We present a search for new particles in an extension to the standard model that includes a heavy Higgs boson ($H^0$), a lighter charged Higgs boson ($H^\pm$), and an even-lighter Higgs boson $h^0$, with decays leading to a $W$-boson pair and a bottom-antibottom quark pair in the final state.

• We use events with exactly one lepton, missing transverse momentum, and at least four jets in data corresponding to an integrated luminosity of 8.7 fb$^{-1}$ collected by the CDF II detector in proton-antiproton collisions at $\sqrt{s}=1.96$ TeV.
• We find the data to be consistent with standard model predictions and report the results in terms of a simplified Higgs-cascade-decay model, setting 95% confidence level upper limits on the product of cross-section and branching fraction from 1.3 pb to 15 fb as a function of $H^0$ and $H^\pm$ masses for $m_h^{0}=126$ GeV$/c^2$.