The Reconstruction of Trilinear Higgs Couplings

Abstract

To establish the Higgs mechanism {\it sui generis} experimentally, the Higgs self-interaction potential must be reconstructed. This task requires the measurement of the trilinear and quadrilinear self-couplings, as predicted in the Standard Model or in supersymmetric theories. The couplings can be probed in multiple Higgs production at high-luminosity e+e- linear colliders. We present the theoretical analysis for the production of neutral Higgs-boson pairs in the relevant channels of double Higgs-strahlung and associated multiple Higgs production.

Figures (11)

• Figure 1: Subprocesses contributing to double Higgs-strahlung in the Standard Model at $e^+e^-$ linear colliders.
• Figure 3: Processes contributing to double and triple Higgs production involving trilinear couplings in the MSSM.
• Figure 5: Total cross sections for MSSM $hh$ production via double Higgs-strahlung at $e^+e^-$ linear colliders for $\tan\beta =3$, $50$ and $\sqrt{s}=500\;\mathrm{GeV}$, including mixing effects ($A = 1$ TeV, $\mu=-1/1$ TeV for $\tan\beta=3/50$). The dotted line indicates the SM cross section.
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