Higgs bosons from vector-boson fusion ine+e−,ep, andppcollisions

We calculate the production of Higgs bosons via W- and Z-boson fusion in $e^{+}$ $e^{\mathrm{-}}$, ep, and pp collisions. Vector-boson fusion is the dominant contribution to Higgs-boson production in $e^{+}$ $e^{\mathrm{-}}$ and pp collisions for heavy Higgs bosons and in ep collisions for all Higgs-boson masses. We determine the maximum Higgs-boson mass which is accessible in each type of collision.