Patrick Janot edited 13311371909925748.tex  almost 11 years ago

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The partial decay width $\Gamma{\rm(H \to WW)}$ is directly proportional to the inclusive cross section $\sigma_{\rm WW \to H}$. The Higgs boson branching ratios to WW and to ${\rm b\bar b}$ are in turn obtained from the measurements performed at $\sqrt{s} = 240$ GeV, the precision of which can be inferred from Table~\ref{tab:HiggsBranching}. With the 350 (240) GeV data, TLEP is therefore able to determine the Higgs boson decay width with a precision of the order of 1.1\% (2.3\%) with WW fusion. When combined with the ZZZ final state, the precision on the total Higgs boson width from TLEP is estimated to be 0.9\%. These numbers are summarized in Table~\ref{tab:Width}, together with a comparison with ILC predictions.  \label{tab:Width}  \begin{table}  \caption{Table~\ref{tab:Width}: Statistical precision of the total Higgs boson width measurement measurements  from TLEP and ILC.} \begin{tabular}{|l|c|c|}  Process and final state & TLEP & ILC \\  ${\small \epemto {\rm HZ}}$ with ${\rm \small H \to ZZ}$ & {\bf 3.1\%} & 20\% \\