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Presentations / Kstmumu / Answers_to_questions / group_meeting.tex
@mchrzasz mchrzasz on 10 Oct 2013 10 KB update before changing laptops
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% see the macros.tex file for definitions
\include{macros }

% title slide definition
\title{Answeres to questions raised by conveners on EW penguin.}
%\subtitle{a bias report}
\author{ Marcin Chrz\k{a}szcz$^{1,2}$ ,  Nicola Serra$^{1}$ }
\institute[UTH, IFJ]
{
 %\begin{tiny}
$ ^1$ University of Zurich , $ ^2$ Institute of Nuclear Physics, Krakow,  
 %\end{tiny}smallsmall
}
  

\date{ \begin{small} $4^{th}$ October 2013 \end{small}}

%--------------------------------------------------------------------
%                           Introduction
%--------------------------------------------------------------------

\begin{document}




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%--------------------------------------------------------------------
%                          OUTLINE
%--------------------------------------------------------------------




\section[Outline]{}
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\tableofcontents
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%-------------------------------------------------------------------
%                          Introduction
%-------------------------------------------------------------------
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\title{Update on analysis}


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\begin{frame}\frametitle{}
\textit{Q: What is the real $\mu\mu$ efficiency after vetoing the $\PJpsi$?}\\
A: \\

		\begin{center}
  \begin{tabular}{ | c | c || l | c |}
    \hline
    \multicolumn{4}{|c| }{Efficiency} \\
    \hline
    \multicolumn{2}{|c|| }{Candidate has 2 real $\mu$ ID as $\mu$} & \multicolumn{2}{|c| }{Candidate has 1 real $\mu$ ID as $\mu$.} \\ \hline \hline
    $\PJpsi$ veto & 83\% &  $\PJpsi$ veto & 99\% \\ \hline
    no $\PJpsi$ veto &96\% &no $\PJpsi$ veto  & 99.9\% \\    \hline
  
  \end{tabular}
\end{center}
\textit{Comment:}
If you are scared of $83\%$ please remember that this is stripping. What happens is that one of two muons is missID as pion. Using $\Ppi/\mu$ veto for swaps, which we do in preselection after stripping  this number goes back to $94\%$.


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\textit{Q: Plot $\PJpsi$ vetrex Chi2 vs Doca.}\\
A: \\
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Signal($\PJpsi \PKstar$ )\\
\includegraphics[scale=0.15]{kstmumu/Jpsi_signal.png}
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MC bck($\PJpsi$ veto)\\
\includegraphics[scale=0.12]{kstmumu/Jpsi_chi2_bck_MC.png}\\
MC bck(no $\PJpsi$ veto)\\
\includegraphics[scale=0.12]{kstmumu/Jpsi_chi2_bck_MC_withJpsi.png}\\
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Data after striping\\
\includegraphics[scale=0.15]{kstmumu/Jpsi_data.png}



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Clearly making a very lose cut on DOCA ($0.45mm$) is harmless.

	\textref {M.Chrz\k{a}szcz, N.Serra 2013}

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\textit{Q: Do we have $\mu$ from PV?}\\
A: No. there is few($\mathcal{O}(10)$) candidates only that $\Ppi$ from PV was missID as $\mu$.

	\textref {M.Chrz\k{a}szcz, N.Serra 2013}

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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%5
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\textit{Q: What is the stripping efficiency?}\\
A: Based on $\tau \to 3\mu$ $12pb^{1}$ sample efficiency is(with $\PJpsi$): 
\begin{equation}
\varepsilon = \dfrac{61.020(stripped)}{10.196.221(Generated)}= 0.599\%
\end{equation}\\
With  $\PJpsi$ veto:
\begin{equation}
\varepsilon = \dfrac{18705(stripped+\PJpsi veto)}{10.196.221(Generated)}= 0.183\%
\end{equation}
Back of the envelope calculation. If we need $1fb^{-1}$ we need 833M events produced, of which 5M will be stored on DSTs(filtered production)
If we veto $\PJpsi$ we will produce (back of the envelope calculation) we need 255M events produced and 1.53M stored in DSTs. 


	\textref {M.Chrz\k{a}szcz, N.Serra 2013}


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\textit{Q: Is $P_t$ harmless?}\\
A: Yes. It's $0.999924$ efficient! See signal MC.\\
\includegraphics[scale=0.5]{kstmumu/pt.png}\\

	\textref {M.Chrz\k{a}szcz, N.Serra 2013}
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\textit{Q: How long does it take to generate 1k generator level events?}\\
A: Around 90 min. on Intel(R) Xeon(R) CPU            5140  \@ 2.33GHz

	\textref {M.Chrz\k{a}szcz, N.Serra 2013}
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