Patrick Janot edited 13311371907855629.tex  over 10 years ago

Commit id: 4793f7db6188e8b273969cfa5265d8c59ac142f7

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The additional events from the Higgs-strahlung process at 350 GeV allow the statistical precision for all the aforementioned measurements to be improved by typically 5\% for TLEP with respect to the sole 240 GeV data. The large number of Higgs bosons produced by boson fusion allows, in both colliders, allows  a measurement of the total width in the ${\rm b\bar b}\nu\bar\nu$ final state. Both the Higgs-strahlung process (when the Z decays to a neutrino pair) and the WW fusionprocess  contribute to this final state, when the Higgs boson decays to ${\rm b \bar b}$, with a similar cross section. The mass recoiling against the ${\rm b \bar b}$ system (also called missing mass), however, peaks around $m_{\rm Z}$ for the Higgs-strahlung and clusters around $\sqrt{s}-m_{\rm H}$ for the WW fusion. A fit of the HZ and WW fusion contributions to the distribution of this missing mass, shown in Fig.~\ref{fig:MissingMass} from Ref.~\cite{cite:durig}, allows $\sigma_{{\rm WW \to H}} \times {\rm BR(H \to b\bar b)}$ to be obtained with a relative precision of 0.6\% at TLEP.