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\title{Update on measurement of Bose-Einstein Correlations}  
\author{Marcin Chrzaszcz$^{1,2}$, Marcin Kucharczyk$^{1,3}$, Tadeusz Lesiak$^{1}$, Mariusz Witek$^{1}$}

\date{$17^{th}$ February 2014} 

\begin{document}

{
\institute{$^1$ Krakow,  $^2$ Zurych, $^3$ Milano}
\setbeamertemplate{footline}{} 
\begin{frame}
\logo{
\vspace{2 mm}
\includegraphics[height=1cm,keepaspectratio]{images/uzh.jpg}~
\includegraphics[height=1cm,keepaspectratio]{images/ifj.png}}

 \titlepage
\end{frame}
}

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%\subsection{From interferometry to particle Physics}
\begin{frame}\frametitle{What do we measure}
\begin{columns}
\column{2.7in}
\begin{itemize}
\item HBT interferometry can be used to study the diameters of source. 
\item For indistinguishable particles the phenomena is know as Bose-Einstein Correlations(BE).
\item BEC correlations occur as enhancement of same particles in the low $Q$ region.
\item We already observed the effects.
\end{itemize}

\column{2.2in}
\begin{center}
{~}\includegraphics[height=2.7cm,keepaspectratio]{images/HBT.png}\\
{~}\\
{~}\includegraphics[height=2.7cm,keepaspectratio]{images/q1.png}
\end{center}
\end{columns}
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\begin{frame}\frametitle{Systematics 1}


\begin{columns}
\column{2.7in}
\begin{itemize}
\item Systematics are starting to be access.
\item For clones pollution we first looked at MC11 MC. 
\item Obtained rates are:
\begin{enumerate}

\item pions: $(0.319 \pm 0.023) \% $
\item kaons: $(0.023 \pm 0.015) \%$
\item kaons: $(0.055 \pm 0.021) \%$
\end{enumerate}
\item Effect clearly different then BEC.
\item Will repeat with 2012 MC.
\end{itemize}

\column{3.5in}
\includegraphics[width=3.5cm]{images/clonesQ_Hist_to3GeV.pdf} \\
{~}\\
\includegraphics[width=3.5cm]{images/q1.png} \\

\end{columns}

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\begin{frame}\frametitle{Coulomb effect - Systematics 2}
\begin{columns}
\column{2.5in}
Fraction of clones:
\begin{itemize}
\item Using data we tried to verify the Coulomb effect in our sample.
\item Suing unlike pairs form the same and different PV.
\item Effect is visible but small $\rightarrow$ small systematics. 
\end{itemize}

\column{3.5in}
\includegraphics[width=6cm]{new/columb.png} \\



\end{columns}

\end{frame}


\end{document}