2002/08/31 by P. Niezurawski, A. F. Zarnecki, M. Krawczyk
Physics and Astronomy · #hep-ph
published as Acta Phys.Polon. B34 (2003) 177-188 · 11 pages, 7 figures; minor changes, references added; submitted to ICHEP'2002
arxiv created 2002/09/06 · arxiv updated 2009/11/30
Measuring the Gamma(h -> gamma gamma)Br(h -> bb) decay at the photon collider at TESLA is studied for a Standard Model Higgs boson of mass mh = 120 GeV. The main background due to the process gamma gamma -> QQ(g), where Q = b,c, is estimated using the NLO QCD program (G. Jikia); the results obtained are compared with the corresponding LO estimate. Using a realistic luminosity spectrum and performing a detector simulation with the SIMDET program, we find that the Gamma(h -> gamma gamma)Br(h -> bb) decay can be measured with an accuracy better than 2% after one year of photon collider running.