Measuring the Higgs to Photon-Photon Branching Ratio at the Next Linear $e^{+}{e}^{-}$ Collider

Abstract

We examine the prospects for measuring the photon-photon branching ratio of a Standard-Model-like Higgs boson ($h$) at the Next Linear $e^{+}{e}^{-}$ Collider when the Higgs boson is produced via $W^{+}{W}^{-}$--fusion: $e^{+}{e}^{-}\to {\nu }_e{\bar{\nu }}_{e}h$. In particular, we study the accuracy of such a measurement and the statistical significance of the associated signal as a function of the electromagnetic calorimeter resolution and the Higgs boson mass. We compare results for the $W^{+}{W}^{-}$--fusion production/measurement mode with the results obtained for the $e^{+}{e}^{-}\to Z^{\ast }\to Zh$ production/measurement mode in a parallel earlier study.

Comments: 5 pages, full postscript file also available via anonymous ftp at ftp://ucdhep.ucdavis.edu/gunion/htogamgam_sm96.ps To appear in ``Proceedings of the 1996 DPF/DPB Summer Study on New Directions for High Energy Physics''