Patrick Janot edited FitConclusion.tex  over 10 years ago

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The projections for HL-LHC in Scenario 2 are truly impressive, and will further improve by including a second detector (ATLAS projections are available in Ref.~\cite{1307.7292}) and more dedicated analyses in the combination. Within the mildly model-dependent assumptions used in the fit -- no exotic decays, and correlated up-type-quark couplings -- the ILC quantitative added value to HL-LHC for the Higgs boson coupling precision does not stick out in a striking manner. In contrast, TLEP would allow these couplings to be measured with sub-per-cent precision, deemed adequate to become sensitive to multi-TeV new physics.  It is to be mentioned, however, that energy upgrades to $\sqrt{s} = 500 GeV$, 500$ GeV,  and possibly to $\sqrt{s} = 1 TeV$, 1$ TeV,  with integrated luminosities of 500~\infb and 1~\inab, respectively, are contemplated for the ILC. An energy upgrade of TLEP to $\sqrt{s} = 500 GeV$ with similar luminosity is also envisioned. The interest of taking $\epem$ collision data at centre-of-mass energies above 350 GeV is briefly discussed in Section~\ref{sec:VHE-LHC}.