Associated production of Higgs bosons and heavy quarks at photon colliders

The idea of fermion mass generation through Yukawa couplings between Higgs bosons and fermions may be tested by their associated production at future linear colliders (LC). We study the production mechanism in the minimal supersymmetric standard model at photon colliders that can be realized by the laser back-scattering technique at a LC. We find that the cross sections for the production of the light Higgs-boson-top-quark pair, heavy-Higgs-boson-bottom pair and pseudoscalar Higgs-boson-bottom pair can reach the level of similar to 1.0 fb or higher for phenomenologically favored values of the parameters in the Higgs sector. Since this mechanism is not affected by the appearance of Higgs resonances as in electron collisions, it may provide a more sensitive way to determine the Yukawa couplings between Higgs bosons and heavy quarks.