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Measuring the Higgs branching fraction into two photons at future linear {mathrm e}^+{mathrm e}^- colliders |
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| Authors: | E. Boos J.-C. Brient D.W. Reid H.J. Schreiber R. Shanidze |
| Affiliation: | Institute of Nuclear Physics, Moscow State University, 119 899 Moscow, Russia, RU Laboratoire de Physique Nucléaire et des Hautes Energies, Ecole Polytechnique, IN2P3-CNRS, 91128 Palaiseau Cedex, France, FR NIKHEF, Postbus 41882, 1009 DB Amsterdam, The Netherlands, NL DESY Zeuthen, 15735 Zeuthen, Germany, DE High Energy Physics Institute, Tbilisi State University, 380086 Tbilisi, Georgia, GE |
| Abstract: | We examine the prospects for a measurement of the branching fraction of the decay mode of a Standard Model-like Higgs boson with a mass of 120 GeV at the future TESLA linear collider, assuming an integrated luminosity of 1 ab and centre-of-mass energies of 350 GeV and 500 GeV. A relative uncertainty on BF(hgg) of 16% can be achieved in unpolarised collisions at = 500 GeV, while for = 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 decay mode appears feasible. Received: 6 December 2000 / Revised version: 19 February 2001 / Published online: 23 March 2001 |
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