Abstract.
We examine the prospects for a measurement of the branching fraction of the \(\gamma \gamma\) decay mode of a Standard Model-like Higgs boson with a mass of 120 GeV\(/c^2\) at the future TESLA linear \({\mathrm e}^+{\mathrm e}^-\) collider, assuming an integrated luminosity of 1 ab\(^{-1}\) and centre-of-mass energies of 350 GeV and 500 GeV. A relative uncertainty on BF(\hgg) of 16% can be achieved in unpolarised \({\mathrm e}^+{\mathrm e}^-\) collisions at \(\sqrt{s}\) = 500 GeV, while for \(\sqrt{s}\) = 350 GeV the expected precision is slightly poorer. With appropriate initial state polarisations the uncertainty can be improved to 10%. If this measurement is combined with a measurement of the total Higgs width, a precision of 10% on the Higgs boson partial width for the \(\gamma \gamma\) decay mode appears feasible.
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Received: 6 December 2000 / Revised version: 19 February 2001 / Published online: 23 March 2001
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Boos, E., Brient, JC., Reid, D. et al. Measuring the Higgs branching fraction into two photons at future linear \({\mathrm e}^+{\mathrm e}^-\) colliders. Eur. Phys. J. C 19, 455–461 (2001). https://doi.org/10.1007/s100520100636
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DOI: https://doi.org/10.1007/s100520100636