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Changeset 515 in svn


Ignore:
Timestamp:
Jul 23, 2009, 11:01:14 PM (15 years ago)
Author:
Xavier Rouby
Message:

derniers chiffres validation tau-jets

Location:
trunk/paper
Files:
4 edited

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  • trunk/paper/CommPhysComp/notes.tex

    r507 r515  
    472472 
    473473\subsection{$b$-tagging}
     474\label{btagging}
    474475
    475476A jet is tagged as $b$-jets if its direction lies in the acceptance of the tracker and if it is associated to a parent $b$-quark. By default, a $b$-tagging efficiency of $40\%$ is assumed if the jet has a parent $b$ quark. For $c$-jets and light jets (i.e.\ originating in $u$, $d$, $s$ quarks or in gluons), a fake $b$-tagging efficiency of $10 \%$ and $1 \%$ respectively is assumed\footnote{\texttt{[code] }Corresponding to the \texttt{BTAG\_b}, \texttt{BTAG\_mistag\_c} and \texttt{BTAG\_mistag\_l} constants, for (respectively) the efficiency of tagging of a $b$-jet, the efficiency of mistagging a $c$-jet as a $b$-jet, and the efficiency of mistagging a light jet ($u$,$d$,$s$,$g$) as a $b$-jet.}.
     
    720721\subsection{\texorpdfstring{$\tau$}{\texttau}-jet efficiency}
    721722Due to the complexity of their reconstruction algorithm, $\tau$-jets have also to be checked.
    722 Table~\ref{tab:taurecoefficiency} lists the reconstruction efficiencies for the hadronic $\tau$-jets in the \textsc{cms} experiment and in \textsc{Delphes}. Agreement is good enough to validate also this reconstruction.
     723Table~\ref{tab:taurecoefficiency} lists the reconstruction efficiencies in \textsc{Delphes} for the hadronic $\tau$-jets from $H,Z \rightarrow \tau^+ \tau^-$. The mass of the Higgs boson is set successively to $140$ and $300~\textrm{GeV}/c^2$. The inclusive gauge boson productions  ($pp \rightarrow HX$ and $pp \rightarrow ZX$) are performed with \textsc{MadGraph/MadEvent} and the $\tau$ lepton decay and further hadronisation are handled by \textsc{Pythia/Tauola}. All reconstructed $\tau$-jets are $1-$prong, and follow the definition described in section~\ref{btagging}, which is very close to an algorithm of the \textsc{cms} experiment~\citep{bib:cmstauresolution}. At last, corresponding efficiencies published by the \textsc{cms} and \textsc{atlas} experiments are quoted for comparison. The agreement is good enough at this level to validate the $\tau-$reconstruction.
    723724
    724725\begin{table}[!h]
    725726\begin{center}
    726 \caption{Reconstruction efficiencies of $\tau$-jets in decays from $Z$ or $H$ bosons, in \textsc{Delphes} and in the \textsc{cms} experiment~\citep{bib:cmstauresolution}.\vspace{0.5cm}}
    727 \begin{tabular}{lll}
     727\caption{Reconstruction efficiencies of $\tau$-jets in $\tau^+ \tau^-$ decays from $Z$ or $H$ bosons, in \textsc{Delphes}, \textsc{cms} and \textsc{atlas} experiments~\citep{bib:cmstauresolution,bib:ATLASresolution}. Two scenarios for the mass of the Higgs boson are investigated. Events generated with \textsc{MadGraph/MadEvent} and hadronised with \textsc{Pythia}. The decays of $\tau$ leptons is handled by the \textsc{Tauola} version embedded in \textsc{Pythia}.\vspace{0.5cm}}
     728%\begin{tabular}{lll}
     729%\hline
     730%\multicolumn{2}{c}{\textsc{cms}} & \\
     731%$Z \rightarrow \tau^+ \tau^-$                   & $38 \%$ &  \\
     732%$H \rightarrow \tau^+ \tau^-$ & $36 \%$ & $m_H = 150~\textrm{GeV}/c^2$ \\
     733%$H \rightarrow \tau^+ \tau^-$ & $47 \%$ & $m_H = 300~\textrm{GeV}/c^2$ \\
     734%\multicolumn{2}{c}{\textsc{Delphes}} & \\
     735%$H \rightarrow \tau^+ \tau^-$ &$42 \%$  & $m_H = 140~\textrm{GeV}/c^2$ \\
     736%\hline
     737%\end{tabular}
     738
     739\begin{tabular}{lrlrl}
    728740\hline
    729 \multicolumn{2}{c}{\textsc{cms}} & \\
    730 $Z \rightarrow \tau^+ \tau^-$                    & $38 \%$ &  \\
    731 $H \rightarrow \tau^+ \tau^-$ & $36 \%$ & $m_H = 150~\textrm{GeV}/c^2$ \\
    732 $H \rightarrow \tau^+ \tau^-$ & $47 \%$ & $m_H = 300~\textrm{GeV}/c^2$ \\
    733 \multicolumn{2}{c}{\textsc{Delphes}} & \\
    734 $H \rightarrow \tau^+ \tau^-$ &$42 \%$  & $m_H = 140~\textrm{GeV}/c^2$ \\
     741                                & \textsc{cms}&\textsc{Delphes} & \textsc{atlas}&\textsc{Delphes}       \\
     742$Z \rightarrow \tau^+ \tau^-$   & $38.2\%$ & $32.4\pm1.8\%$     & $33\%$ & $28.6\pm 1.9\%$              \\
     743$H(140) \rightarrow \tau^+ \tau^-$      & $36.3\%$ & $39.9\pm1.6\%$     & & $32.8\pm 1.8\%$             \\
     744$H(300) \rightarrow \tau^+ \tau^-$      & $47.3\%$ & $49.7\pm1.5\%$     & & $43.8\pm 1.6\%$             \\
    735745\hline
     746
    736747\end{tabular}
    737748\label{tab:taurecoefficiency}
  • trunk/paper/notes.tex

    r508 r515  
    671671\subsection{\texorpdfstring{$\tau$}{\texttau}-jet efficiency}
    672672Due to the complexity of their reconstruction algorithm, $\tau$-jets have also to be checked.
    673 Table~\ref{tab:taurecoefficiency} lists the reconstruction efficiencies for the hadronic $\tau$-jets in the \textsc{cms} experiment and in \textsc{Delphes}. Agreement is good enough to validate also this reconstruction.
     673Table~\ref{tab:taurecoefficiency} lists the reconstruction efficiencies in \textsc{Delphes} for the hadronic $\tau-$jets from $H,Z \rightarrow \tau^+ \tau^-$. The mass of the Higgs boson is set successively to $140$ and $300~\textrm{GeV}/c^2$. The inclusive gauge boson productions  ($pp \rightarrow HX$ an
     674d $pp \rightarrow ZX$) are performed with \textsc{MadGraph/MadEvent} and the $\tau$ lepton decay and further hadronisation are handled by \textsc{Pythia/
     675Tauola}. All reconstructed $\tau$-jets are $1-$prong, and follow the definition described in section~\ref{btagging}, which is very close to an algorithm
     676of the \textsc{cms} experiment~\cite{bib:cmstauresolution}. At last, corresponding efficiencies published by the \textsc{cms} and \textsc{atlas} experim
     677ents are quoted for comparison. The agreement is good enough at this level to validate the $\tau-$reconstruction.
     678
     679
     680
     681
    674682
    675683\begin{table}[!h]
    676684\begin{center}
    677 \caption{Reconstruction efficiencies of $\tau$-jets in decays from $Z$ or $H$ bosons, in \textsc{Delphes} and in the \textsc{cms} experiment~\cite{bib:cmstauresolution}.\vspace{0.5cm}}
    678 \begin{tabular}{lll}
     685\caption{Reconstruction efficiencies of $\tau$-jets in $\tau^+ \tau^-$ decays from $Z$ or $H$ bosons, in \textsc{Delphes}, \textsc{cms} and \textsc{atlas
     686} experiments~\cite{bib:cmstauresolution,bib:ATLASresolution}. Two scenarios for the mass of the Higgs boson are investigated. Events generated with \textsc{MadGraph/MadEvent} and hadronised with \textsc{Pythia}. The decays of $\tau$ leptons is handled by the \textsc{Tauola} version embedded in \textsc{Pythia}.\vspace{0.5cm}}
     687
     688\begin{tabular}{lrl}
    679689\hline
    680 \multicolumn{2}{c}{\textsc{cms}} & \\
    681 $Z \rightarrow \tau^+ \tau^-$                    & $38 \%$ &  \\
    682 $H \rightarrow \tau^+ \tau^-$ & $36 \%$ & $m_H = 150~\textrm{GeV}/c^2$ \\
    683 $H \rightarrow \tau^+ \tau^-$ & $47 \%$ & $m_H = 300~\textrm{GeV}/c^2$ \\
    684 \multicolumn{2}{c}{\textsc{Delphes}} & \\
    685 $H \rightarrow \tau^+ \tau^-$ &$42 \%$  & $m_H = 140~\textrm{GeV}/c^2$ \\
     690                                & \textsc{cms}&\textsc{Delphes}        \\
     691$Z \rightarrow \tau^+ \tau^-$   & $38.2\%$ & $32.4\pm1.8\%$            \\
     692$H(140) \rightarrow \tau^+ \tau^-$      & $36.3\%$ & $39.9\pm1.6\%$    \\
     693$H(300) \rightarrow \tau^+ \tau^-$      & $47.3\%$ & $49.7\pm1.5\%$    \\
     694                                & \textsc{atlas}&\textsc{Delphes}        \\
     695$Z \rightarrow \tau^+ \tau^-$   & $33\%$ & $28.6\pm 1.9\%$              \\
     696$H(140) \rightarrow \tau^+ \tau^-$    &  & $32.8\pm 1.8\%$             \\
     697$H(300) \rightarrow \tau^+ \tau^-$    &  & $43.8\pm 1.6\%$             \\
     698
    686699\hline
    687700\end{tabular}
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