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Particle physics models with more than one Higgs boson occur in manyframeworks for physics beyond the standard model, including supersymmetry,technicolor, composite Higgs, and "little Higgs" models. If the Higgs sectorcontains couplings stronger than electroweak gauge couplings, there will beheavy Higgs particles that decay to lighter Higgs particles plus heavyparticles such as $W$, $Z$, and $t$. This motivates searches for final statesinvolving multiple $W$, $Z$, $t$, and $\bar{b}b$ pairs. A two Higgs doubletmodel with custodial symmetry is a useful simplified model to describe many ofthese signals. The model can be parameterized by the physical Higgs masses andthe mixing angles $\al$ and $\be$, so discovery or exclusion in this parameterspace has a straightforward physical interpretation. We illustrate this with adetailed analysis of the process $gg \to A$ followed by $A \to h Z$ and $h \toWW$. For $m_{A} \simeq 330\GeV$, $m_{h} \simeq 200\GeV$ we can get a $4.5\si$signal with 1 fb${}^{-1}$ of integrated luminosity at the Large HadronCollider.

Early Higgs Boson Discovery in Non-minimal Higgs Sectors