Higgs Boson Production in gamma-gamma Collisions via Resolved Photon   Contributions
  We studied single Higgs boson production in $\gamma\gamma$ collisions proceeding via the hadronic content of the photon. For SM Higgs masses of current theoretical interest, the resolved photon contributions are non-negligible in precision cross section measurements. We found that production of the heavier Higgs bosons H^0 and A^0 of the MSSM can probe regions of the SUSY parameter space that will complement other measurements. Finally, we showed that associated t H^\pm production in gamma-gamma collisions can be used to make an accurate determination of tan(beta) for low and high tan(beta)by precision measurements of the gamma gamma to H^\pm t +X cross section. 
Stephen Godfrey, Shou-Hua Zhu, and M.A. Doncheski