Patrick Janot edited 13311371909925748.tex  over 10 years ago

Commit id: e4d6483663a5f639d848790822b8f76adb0576c2

deletions | additions      

       

\end{tabular}   \end{center}  \end{table}  These measurements can also be used to determine the total Higgs decay width in a way similar to that described in the previous section. Indeed, the total Higgs boson width is given by $\Gamma_{\rm tot} = \Gamma {\rm(H \to WW)}/{\rm BR(H \to WW)}$.\begin{equation}   \Gamma_{\rm tot} = \frac{\Gamma {\rm(H \to WW)}}{{\rm BR(H \to WW)}}.   \end{equation}  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 1.2\% (2.4\%) with WW fusion. When combined with the ZZZ final state, the precision on the total Higgs boson width from TLEP is estimated to be 1.0\%. These numbers are summarized in Table~\ref{tab:Width}. \begin{table}  \begin{center}  \caption{Table~\ref{tab:Width}: Statistical precision of the total Higgs boson width measurements with TLEP at $\sqrt{s}=$ 240 and 350 GeV. For illustration, the ILC potential at the same centre-of-mass energies is also indicated.\label{tab:Width}}