Pseudoscalar Higgs production in association with heavy-quark pairs at hadron colliders

We present the next-to-leading order QCD predictions for the pseudoscalar Higgs production in association with heavy-quark pairs at hadron colliders ($pp(p \bar p) \rightarrow Q \bar Q A^0$) where both the top and bottom quark pairs in the final states are considered. We compare the total cross sections as well as some differential distributions against the scalar Higgs case.