In this work, we consider two heavy Higgs bosons ($H$ and $A$) of about $2.4\!\sim\!4.8$ TeV in the semi-constrained NMSSM (scNMSSM) in our previous work. We study them in the $pp\to b\bar{b}H/A \to b\bar{b}t\bar{t}$ channel at a 100 TeV hardon collider. We calculate their cross section of production and branching ratios of decay, and compare the signal with the simulation result in a reference. We finally find that it is hard to detect the heavy Higgs bosons in this channel at the 100 TeV collider with an integrated luminosity of $3~{\rm ab}^{-1}$, because their branching ratio to SM particles including $t\bar{t}$ are seriously suppressed by the decay to SUSY particles. We will add discussions about detecting in other channels later.
Comment: 12 pages, 6 figures