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Higgs-boson production from heavy-quark fusion.

We study the production of Higgs bosons from heavy-quark fusion at future hadron colliders. We use a heavy-quark distribution function to combine the processes QQ-bar..-->..H and gQ..-->..HQ with the process gg..-->..QQ-barH to obtain a cross section in which potentially large logarithms, of order ln(m/sub H//m/sub Q/), are summed to all orders in the strong coupling. We show that Higgs bosons which have an enhanced coupling to bottom quarks may be predominantly produced via bottom-quark fusion. We concentrate on the supersymmetric two-Higgs-doublet model, in which this enhancement occurs naturally.