2000/11/29 by E. Boos, J. -C. Brient, J.C. Brient +5 · 1 citation
Engineering · Physics and Astronomy · #Particle Accelerators and Free-Electron Lasers #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1007/s100520100636
published as Eur.Phys.J.C19:455-461,2001 · 14 pages, 5 figures
arxiv created 2000/11/29 · openalex publication_date 2001/03/01 · arxiv updated 2009/11/30 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
We examine the prospects for measuring the \gaga branching fraction of a Standard Model-like Higgs boson with a mass of 120 GeV at the future TESLA linear \ee collider, assuming an integrated luminosity of 1 ab-1 and center-of-mass energies of 350 GeV and 500 GeV. The Higgs boson is produced in association with a fermion pair via the Higgsstrahlung process \ee → ZH, with Z → \qq or \nn, or the WW fusion reaction e+e- → νe νe H. A relative uncertainty on BF(\hgg) of~16% can be achieved in unpolarized \ee collisions at √(s)=~500 GeV, while for √(s)=~350 GeV the expected precision is slightly poorer. With appropriate initial state polarizations ΔBF(\hgg)/BF(\hgg) can be improved to 10%. If this measurement is combined with the expected error for the total Higgs width, a precision of 10% on the \gaga Higgs boson partial width appears feasible.