Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-03-12
JHEP0502:041,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 9 figures; published version
Scientific paper
10.1088/1126-6708/2005/02/041
The feasibility of measuring the Higgs-boson properties at the Photon Collider at TESLA has been studied in detail for masses between 200 and 350 GeV, using realistic luminosity spectra and detector simulation. We consider the Two Higgs Doublet Model (II) with SM-like Yukawa couplings for h, parametrized by only one parameter (tan(beta)). The combined measurement of the invariant-mass distributions in the ZZ and W+W- decay-channels is sensitive to both the two-photon width Gamma_{gamma gamma} and phase Phi_{gamma gamma}. From the analysis including systematic uncertainties we found out that after one year of Photon Collider running with nominal luminosity the expected precision in the measurement of tan(beta) is of the order of 10%, for both light (h) and heavy (H) scalar Higgs bosons. The H-A mixing angle Phi_{HA}, characterizing a weak CP violation in the model with two Higgs doublets, can be determined to about 100 mrad, for low tan(beta).
Filip Żarnecki Aleksander
Krawczyk Maria
Niezurawski Piotr
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