Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-07-26
Phys.Lett. B579 (2004) 157-164
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 7 figures, LaTeX. Corrections of published version included
Scientific paper
10.1016/j.physletb.2003.10.074
The prospects for the measurement of the pseudoscalar admixture in the h-tau-tau coupling to a Standard Model Higgs boson of 120 GeV mass are discussed in a quantitative manner e+ e- collisions of 350 GeV centre-of-mass energy. Specific angular distributions in the h --> tau tau; tau --> rho nu decay chain can be used to probe mixing angles of scalar--pseudoscalar h-tau-tau couplings. In the discussion of the feasibility of the method, assumptions on the properties of a future detector for an e+ e- linear collider such as TESLA are used. The Standard Model Higgsstrahlung production process is taken as an example. For the expected performance of a typical Linear Collider set-up, the sensitivity of a measurement of the scalar--pseudoscalar mixing angle turned out to be 6 degree. It will be straightforward to apply our results to estimate the sensitivity of a measurement, in cases another scenario of the Higgs boson sector (Standard Model or not) is chosen by nature. The experimental error of the method is expected to be limited by the statistics.
Desch Klaus
Imhof Arnout
was Zbigniew
Worek Malgorzata
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