Determination of the Higgs-boson couplings and H-A mixing in the generalized SM-like Two Higgs Doublet Model

Abstract

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).

arXiv comment17 pages, 9 figures; published version

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• Pair Production of Two-Higgs-Doublet_Model Light Higgs Bosons in $\gamma \gamma$ Collisions
• Rare top decay $t\to c\gamma$ with flavor changing neutral scalar interactions in two Higgs doublet model
• The lightest Higgs boson production at photon colliders in the 2HDM-III
• CP violation through particle mixing and the H-A lineshape
• CP Studies of the Higgs Sector
• Recent progress on Higgs physics at a $\gamma \gamma$ collider
• Testing Higgs sector of 2HDM