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\author{ {\fontspec{Trebuchet MS}Marcin Chrz\k{a}szcz} (Universit\"{a}t Z\"{u}rich)}
\institute{UZH}
\title[WGR report on $\PB \to 4\Pmu$]{WGR report on $\PB \to 4\Pmu$}
\date{25 May 2016}


\begin{document}
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{
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\begin{center}
\begin{center}
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		\begin{column}{0.75\textwidth}
			\flushright\fontspec{Trebuchet MS}\bfseries \Huge {WGR report on $\PB \to 4\Pmu$}
		\end{column}
                \begin{column}{0.02\textwidth}
                  {~}
                  \end{column}
                \begin{column}{0.23\textwidth}
                 % \hspace*{-1.cm}
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	\quad
	\vspace{3em}
\begin{columns}
\begin{column}{0.44\textwidth}
\flushright \vspace{-1.8em} {\fontspec{Trebuchet MS} \Large Marcin Chrząszcz\\\vspace{-0.1em}\small \href{mailto:mchrzasz@cern.ch}{mchrzasz@cern.ch}}

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\vspace{1em}
%		\footnotesize\textcolor{gray}{With N. Serra, B. Storaci\\Thanks to the theory support from M. Shaposhnikov, D. Gorbunov}\normalsize\\
\vspace{0.5em}

	\textcolor{normal text.fg!50!Comment}{Special RD meeting, CERN\\May 25, 2016}
\end{center}
\end{frame}
}


\begin{frame}{Basic information}
	\begin{minipage}{\textwidth}
\ARROW twiki: \\ \href{https://twiki.cern.ch/twiki/bin/viewauth/LHCbPhysics/B24Mu}{\url{https://twiki.cern.ch/twiki/bin/viewauth/LHCbPhysics/B24Mu}}\\
\ARROW Newest ANA note:\\
\href{ https://twiki.cern.ch/twiki/pub/LHCbPhysics/B24Mu/4mu-note-v0_3.pdf}{\url{ https://twiki.cern.ch/twiki/pub/LHCbPhysics/B24Mu/4mu-note-v0_3.pdf}}\\
\ARROW The time schedule: \\
\ARROW Authors:\\
J. Albrecht, A. Baranov, D. Berninghoff, A. Golutvin, P. Klauke, T.~Likhomanenko, N. Nikitin, N. Scharmberg, T. Tekampe, A. Ustyuzhanin\\
\ARROW Time schedule:\\
\ARROWR First circulation: Jan $13^{\rm th}$.\\
\ARROWR Newest circulation: May $13^{\rm th}$.\\


	\end{minipage}
		\vspace*{2.cm}
\end{frame}




\begin{frame}{Key points}
	\begin{minipage}{\textwidth}
	{~}\\
\ARROW Analysis is an update of the $1~\rm fb^{-1}$.\\
\ARROW The expected limit has been significantly improved compared to previous.\\
\ARROW Key points:
\begin{itemize}
\item Problems with SM MC. The classifier was retrained with PHSP model.
\item From training the model dependent variables were removed.
\item The Data-MC correction were using a BDT reweighing. The were highly correlated variables used(ntracks, spdhits). Removed the correlated variables $\rightarrow$ fixed the high weights problem.
\end{itemize}
\ARROW All the raised points in the WG review were accessed.\\
\ARROW The interesting points for other analysis:
\begin{itemize}
\item BDT reweighing.
\item N-dim grid optimisation.
\end{itemize}


	\end{minipage}
		\vspace*{2.cm}
\end{frame}



\begin{frame}
	\begin{minipage}{\textwidth}
	{~}\\

\begin{center}
\begin{Large}
I congratulate the proponents on a nice analysis and wish them nice review! 
\end{Large}
\end{center}

	\end{minipage}
		\vspace*{2.cm}
\end{frame}


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