Patrick Janot edited HHHContd.tex  over 10 years ago

Commit id: 8c5400d57ee8b638d63aa147c476d3bcd717839c

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An observations with a significance of 5$\sigma$ or above observation  of the standard-model value of the trilinear Higgs self-couplings self-coupling with a significance of 5$\sigma$ or above  can only be done In addition to having the highest energy reach, the VHE-LHC would also allow to measure the ttH and the HHH couplings with the best precisions, 1\% and 10\% respectively, with 300~$\infb$. New physics effects to the HHH coupling cannot exceed a 20\% deviation at HE-LHC, CLIC or VHE-LHC,  with respect projected precisions of 15\%, 10  to the standard model prediction~\cite{cite:1305.6397}. Such a small deviation can only be probed by the VHE-LHC. 16\%, and 5\%, respectively.  Since deviationsdue to new physics effects  in the HHH coupling arising from new physics effects  is expected to be smaller than 20% $\pm 20\%$  with respect to the standard model prediction (Gupta 2013), it prediction~\cite{cite:1305.6397}, such new physics effects  can only be probed by at  the VHE-LHC VHE-LHC.