Patrick Janot edited FitResults.tex  almost 11 years ago

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As is visible from Table~\ref{tab:FitResults} and appears clearly Fig.~\ref{fig:FitResults}, it is only with the TLEP high-statistics data samples that a model-independent precision systematically below 1\% (and at times approaching the per-mil level), required for the coupling measurements to become sensitive to (multi-)TeV new physics. It is also important to compare the projections of TLEP and ILC to those from the HL-LHC, to evaluate the added value of an $\epem$ Higgs factory after $3~\inab$ of proton-proton collision data.   A truly model-independent fit cannot be performed from proton-proton collision data : the total decay width cannot be determined and the ${\rm H \to c\bar c}$ decay cannot be isolated by the LHC detectors. Additional assumptions thus need to be made for a meaningful comparison with $\epem$ Higgs factories. Here, constraints similar to those used in Ref.~\cite{Barger_Ishida_Keung_2012} are applied : it is assumed that no Higgs boson exotic decays take place, and that deviations of the coupling to c quark charm and top couplings  are correlated. The CMS report~\cite{cite:CMS} submitted to  the same as the deviations recent European Strategy Update Workshop contains estimates  of the coupling to the top. CMS results with $3~\inab$ with similar hypotheses, in two scenarios: Scenario 1 with all systematic uncertainties unchanged, and Scenario 2, with experimental systematic uncertainties scaling like $1/\sqrt{L}$ and theoretical errors halved.  Comparison with HL-LHC and ILC with the assumption of no exotic decays.