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Presentations / Lb_SL / Preselection / mchrzasz.tex
@mchrzasz mchrzasz on 22 Oct 2015 9 KB added slides for Lambda b
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  200.  
  201.  
  202.  
  203. \author{ {\fontspec{Trebuchet MS}Marcin Chrz\k{a}szcz} (Universit\"{a}t Z\"{u}rich, IFJ PAN)}
  204. \institute{UZH}
  205. \title[Preselection for $\PLambdab \to \PLambda_c^{\ast} \ell \nu$]{Preselection for $\PLambdab \to \PLambda_c^{\ast} \ell \nu$$}
  206.  
  207.  
  208.  
  209. \begin{document}
  210. \tikzstyle{every picture}+=[remember picture]
  211.  
  212. {
  213. \setbeamertemplate{sidebar right}{\llap{\includegraphics[width=\paperwidth,height=\paperheight]{bubble2}}}
  214. \begin{frame}[c]%{\phantom{title page}}
  215. \begin{center}
  216. \begin{center}
  217. \begin{columns}
  218. \begin{column}{0.75\textwidth}
  219. \flushright\fontspec{Trebuchet MS}\bfseries \Huge {Preselection for $\PLambdab \to \PLambda_c^{\ast} \ell \nu$}
  220. \end{column}
  221. \begin{column}{0.02\textwidth}
  222. {~}
  223. \end{column}
  224. \begin{column}{0.23\textwidth}
  225. % \hspace*{-1.cm}
  226. \vspace*{-3mm}
  227. \includegraphics[width=0.6\textwidth]{lhcb-logo}
  228. \end{column}
  229. \end{columns}
  230. \end{center}
  231. \quad
  232. \vspace{3em}
  233. \begin{columns}
  234. \begin{column}{0.44\textwidth}
  235. \flushright \vspace{-1.8em} {\fontspec{Trebuchet MS} \Large Marcin Chrząszcz\\\vspace{-0.1em}\small \href{mailto:mchrzasz@cern.ch}{mchrzasz@cern.ch}}
  236.  
  237. \end{column}
  238. \begin{column}{0.53\textwidth}
  239. \includegraphics[height=1.3cm]{uzh-transp}{~}{~}
  240. \includegraphics[height=1.1cm]{ifj.png}
  241. \end{column}
  242. \end{columns}
  243.  
  244. \vspace{1em}
  245. \footnotesize\textcolor{gray}{Universit\"{a}t Z\"{u}rich, \\ Institute of Nuclear Physics, Polish Academy of Science}\normalsize\\
  246. \vspace{0.5em}
  247.  
  248. \textcolor{normal text.fg!50!Comment}{CERN\\October 22, 2015}
  249. \end{center}
  250. \end{frame}
  251. }
  252.  
  253.  
  254. \begin{frame}[c]{Preselection}
  255.  
  256. \begin{minipage}{\textwidth}
  257. \begin{itemize}
  258. \item Stripping has a tight cuts on $\PLambda_c$ candidates but no cuts on $\PLambda_c^{\ast}$.
  259. \item I run a small portion of MC without any cuts(aka paring each $\PLambda_c$ with any 2 pions in the vents).
  260. \item Based on this sample I selected 3 cuts:
  261. \end{itemize}
  262. \begin{center}
  263.  
  264.  
  265. \begin{tabular}{|c|c|}
  266. \hline
  267. Var & value \\ \hline
  268. $\pi~\rm Pt$ & $>300~\MeV$\\
  269. $\PLambda_c^{\ast}~\rm VRT \chi^2$ & $<20$\\ \hline
  270. \end{tabular}
  271. \end{center}
  272.  
  273. \begin{itemize}
  274. \item The MC looks normally after those cuts, but still waiting for data.
  275. \item Efficiency of thouse cuts is $\sim 90~\%$.
  276. \item Idea is to keep the preselection loose but use MVA.
  277. \end{itemize}
  278.  
  279.  
  280. \end{minipage}
  281. \vspace*{2.cm}
  282. \end{frame}
  283.  
  284. \begin{frame}[c]{Preselection}
  285. \begin{minipage}{\textwidth}
  286. \begin{itemize}
  287. \item Impact on MC sample(left no preselection, right after preselection).
  288. \end{itemize}
  289.  
  290.  
  291. \begin{columns}
  292. \column{0.5\textwidth}
  293.  
  294. \includegraphics[width=0.95\textwidth]{nosel.png}
  295. \column{0.5\textwidth}
  296.  
  297. \includegraphics[width=0.95\textwidth]{sel.png}
  298. \end{columns}
  299.  
  300. \end{minipage}
  301. \vspace*{2.cm}
  302. \end{frame}
  303.  
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  312. \backupend
  313.  
  314. \end{document}