Abstract

The $\mathrm{ZZ}$ pair production rate in high energy $\ensuremath{\gamma}\ensuremath{\gamma}$ collisions is evaluated with photons from laser backscattering. We find that searching for the standard model Higgs boson with a mass up to, or slightly larger than, 400 GeV via the $\mathrm{ZZ}$ final state is possible via photon fusion with backscattered laser photons at a linear ${e}^{+}{e}^{\ensuremath{-}}$ collider with energies is the range $600 \mathrm{GeV}<\sqrt{{s}_{{e}^{+}{e}^{\ensuremath{-}}}}<1000 \mathrm{GeV}$.

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