Abstract
A study of the measurement of the two photon decay width times the branching ratio of the Standard Model Higgs boson with a mass of 120 GeV in photon–photon collisions is presented, assuming a γ γ integrated luminosity of 80 fb−1 in the high energy part of the spectrum. The analysis is based on the reconstruction of the Higgs events produced in the γ γ→H process, followed by the decay of the Higgs into a $\mathrm{b}\bar{\mathrm{b}}$ pair. A statistical error of the measurement of the two-photon width, Γ(H→γ γ), times the branching ratio of the Higgs boson, BR $(\mathrm{H}\to \mathrm{b}\bar{\mathrm{b}})$ is found to be 2.1% for one year of data taking.
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