Production of four-weak-bosons and heavy Higgs signals in TeV photon-photon collisions

We have studied the signals for a heavy Higgs boson in the processes γγ → WWWW, and γγ → WWZZ at a photon linear collider. The results are based on the first complete tree-level calculation for these reactions. We show that, with a forward “spectator” W tag, and a central “spectator” W veto to suppress backgrounds from transverse W, Z production, the invariant mass spectrum of central WW, ZZ pairs is sensitive to Higgs bosons with a mass up to 1 TeV in a 2-TeV linear collider.