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We discuss exclusive double diffractive (EDD) production of Higgs boson andheavy quark - heavy antiquark pairs at high energies. Differentialdistributions for $c \bar c$ at $\sqrt{s}$ = 1.96 GeV and for $b \bar b$ at$\sqrt{s}$ = 14 TeV are shown and discussed. Irreducible leading-order $b \barb $ background to Higgs production is calculated in several kinematicalvariables. The signal-to-background ratio is shown and several improvements aresuggested by imposing cuts on $b$ ($\bar b$) transverse momenta and rapidities.

Diffractive exclusive production of Higgs boson and heavy quark pairs at high energy proton-proton collisions