Neutral Higgs-boson pair production at hadron colliders: QCD corrections -art. no. 115012

Neutral Higgs-boson-pair production provides the possibility of studying th e trilinear Higgs couplings at future high-energy colliders. We present the QCD corrections to the gluon-initiated processes in the limit of a heavy t op quark in the loops and the Drell-Yan-like pair production of scalar and pseudoscalar Higgs particles. The pp cross sections are discussed for CERN LHC energies within the standard model and its minimal supersymmetric exten sion. The QCD corrections are large, enhancing the total cross sections sig nificantly. [S0556-2821(98)03719-9].