Adds March 16 presentation

docs/presentations/2018_03_16/beamerthemebjeldbak.sty

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+% Insipired by Cameron Bracken's theme originally posted
+% here: http://cameron.bracken.bz/beamer-template
+% January 2009
+
+% Modifications done by Martin Bjeldbak Madsen
+% June 2014
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docs/presentations/2018_03_16/main.tex

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+
+% rubber: module pdftex
+
+\documentclass[english,aspectratio=43,8pt]{beamer}
+\usepackage{graphicx}
+\usepackage{amssymb}
+\usepackage{booktabs}
+\usepackage{siunitx}
+\usepackage{subcaption}
+\usepackage{marvosym}
+\usepackage{verbatim}
+\usepackage[normalem]{ulem}  % Needed for /sout
+
+\newcommand{\pb}{\si{\pico\barn}}%
+\newcommand{\fb}{\si{\femto\barn}}%
+\newcommand{\invfb}{\si{\per\femto\barn}}
+\newcommand{\GeV}{\si{\giga\electronvolt}}
+
+\hypersetup{colorlinks=true,urlcolor=blue}
+
+\usetheme[]{bjeldbak}
+
+\newcommand{\backupbegin}{%
+   \newcounter{finalframe}
+   \setcounter{finalframe}{\value{framenumber}}
+}
+\newcommand{\backupend}{%
+   \setcounter{framenumber}{\value{finalframe}}
+}
+
+\begin{document}
+
+\title[$e$ Seeding Validation]{Offline Electron Seeding Validation \-- Update}
+\author[C. Fangmeier]{\textbf{Caleb Fangmeier} \\ Ilya Kravchenko,  Greg Snow}
+\institute[UNL]{University of Nebraska \-- Lincoln}
+\date{EGamma Reco/Comm/HLT Meeting | March 16, 2018}
+
+\titlegraphic{%
+\begin{figure}
+  \includegraphics[width=1in]{CMSlogo.png}\hspace{0.75in}\includegraphics[width=1in]{nebraska-n.png}
+\end{figure}
+}
+
+\begin{frame}[plain]
+  \titlepage%
+\end{frame}
+
+\begin{frame}{Introduction}
+  \begin{itemize}
+    \item Our goal is to study \textbf{seeding} for the \textbf{offline} GSF tracking with the \textbf{new pixel detector}.
+    \item Specifically, we want to optimize the new pixel-matching scheme from HLT for use in off-line reconstruction.
+    \item This Talk:
+      \begin{itemize}
+        \item Show corrected performance comparisons between old and new seeding
+        \item Show reduction in number of seeds not resulting in GSF tracks
+      \end{itemize}
+    \item Additional plots are available here \url{https://eg.fangmeier.tech/seeding\_studies\_2018\_03\_08\_17/output/}
+  \end{itemize}
+\end{frame}
+
+
+\begin{frame}{N-Hit Electron Seeding}
+  \begin{columns}
+  \begin{column}{0.5\textwidth}
+    {\small
+    \begin{enumerate}
+      \item Using the beam spot, the SC position, and SC energy, propagate a path through the pixels.
+      \item Require the first hit to be within a $\delta\phi$ and $\delta z$ window. ($\delta\phi$ and $\delta R$ for FPIX)
+      \item $\delta z$ window for first hit is huge as SC and beam spot positions give very little information about $z$.
+      \item Forget the SC position, and propagate a new track based on the vertex and first hit positions, and the SC energy.
+      \item Progress one-by-one through the remaining hits in the seed and require each one fit within a specified window around the track.
+      \item Quit when all hits are matched, or a hit falls outside the window. No skipping is allowed.
+    \end{enumerate}
+    }
+  \end{column}
+  \begin{column}{0.5\textwidth}
+    \begin{figure}
+      \includegraphics[width=0.9\textwidth]{../common/diagrams/seeding_step2.png}
+    \end{figure}
+    \begin{figure}
+      \includegraphics[width=0.9\textwidth]{../common/diagrams/seeding_step3.png}
+    \end{figure}
+  \end{column}
+  \end{columns}
+\end{frame}
+
+\begin{frame}{Previous status-quo}
+  \begin{columns}
+    \begin{column}{0.45\textwidth}
+      {\small
+      \begin{itemize}
+        \item In a previous presentation\footnotemark, I showed efficiency vs. purity for
+          \begin{itemize}
+            \item Old pair-match seeding (\texttt{ElectronSeedProducer})
+            \item New triplet+ seeding (\texttt{ElectronNHitSeedProducer}) for several choices of matching windows.
+          \end{itemize}
+          \item Old seeding produced far fewer fake (non-truth matched) seeds at similar efficiency.
+          \item Unclear why. Perhaps not optimal matching windows?
+      \end{itemize}
+    }
+    \end{column}
+    \begin{column}{0.6\textwidth}
+      \begin{figure}
+        \includegraphics[width=0.9\textwidth]{../common/figures/tracking_roc_curves_linear_plus_old.png}
+      \end{figure}
+    \end{column}
+  \end{columns}
+\footnotetext[1]{\tiny \url{https://indico.cern.ch/event/697074/contributions/2898322/attachments/1602057/2540261/main.pdf}}
+\end{frame}
+
+\begin{frame}{$H/E$ Requirement on Super-Clusters}
+  \begin{columns}
+    \begin{column}{0.45\textwidth}
+      {\small
+      \begin{itemize}
+        \item Investigating the cause of this revealed that the old seeding had applied a $H/E<0.15$ cut on super-clusters.
+        \item After applying this same cut on the new seeds, the performance gap becomes negligible.
+        \item The \textbf{narrow} working point of the new seeding uses HLT window sizes(see backup).
+        \item Performance of the old seeding can be closely matched with the \textbf{wide} matching windows.
+      \end{itemize}
+    }
+    \end{column}
+    \begin{column}{0.6\textwidth}
+      \begin{figure}
+        \includegraphics[width=0.9\textwidth]{../common/figures/tracking_roc_curves_linear_plus_old_hoe.png}
+      \end{figure}
+    \end{column}
+  \end{columns}
+\end{frame}
+
+\begin{frame}{Kinematic Distributions}
+  \begin{columns}
+    \begin{column}{0.5\textwidth}
+      \begin{figure}
+        \includegraphics[width=\textwidth]{../common/figures/tracking_efficiency_hoe.png}
+      \end{figure}
+      \centering{Tracking Efficiency}
+    \end{column}
+    \begin{column}{0.5\textwidth}
+      \begin{figure}
+        \includegraphics[width=\textwidth]{../common/figures/tracking_purity_hoe.png}
+      \end{figure}
+      \centering{Tracking Purity}
+    \end{column}
+  \end{columns}
+\end{frame}
+
+\begin{frame}{Seed Counts}
+  \begin{columns}
+    \begin{column}{0.45\textwidth}
+      {\small
+      \begin{itemize}
+        \item The amount of electron seeds is dramatically reduced by the new matching scheme.
+        \item Part of the motivation for use in HLT.
+        \item Factor of $\approx 4$ reduction comparing to the \texttt{wide} working point
+      \end{itemize}
+    }
+    \end{column}
+    \begin{column}{0.65\textwidth}
+      \begin{figure}
+        \includegraphics[width=\textwidth]{../common/figures/n_seeds.png}
+      \end{figure}
+    \end{column}
+  \end{columns}
+\end{frame}
+
+\begin{frame}{Outlook}
+  % \vspace{0.4in}
+  \begin{itemize}
+    \item \texttt{NHit} seeding can match (and perhaps even slightly improve upon) the old pair-match seeding.
+    \item It can do this while producing far fewer candidate seeds.
+  \end{itemize}
+  \hrule
+  \begin{itemize}
+    \item Next Steps:
+    \begin{itemize}
+      \item Verify performance is still acceptable in high fake environments ($t\bar{t}$ for example)
+      \item Settle on an ``optimal enough'' set of windows
+      \item Decide on which CMSSW release to target and begin preparing (private branch/merge request/etc.)
+    \end{itemize}
+  \item Other Thoughts
+    \begin{itemize}
+      \item What are expert's opinions on continued window optimization? (Likely some small gains still to be had)
+      \item Are there other ideas for cross-checks to be done before proceeding further?
+    \end{itemize}
+  \end{itemize}
+  % \vspace{1.5in}
+\end{frame}
+
+\appendix
+\backupbegin
+
+\begin{frame}
+  \begin{center}
+    {\Huge BACKUP}
+  \end{center}
+\end{frame}
+
+\begin{frame}{Definitions}
+  \begin{itemize}
+    \item \textbf{Sim-Track \--} A track from a simulated electron originating from the luminous region of CMS (beam-spot +- 5$\sigma$)
+    \item \textbf{ECAL-Driven Seed \--} A seed created via a matching procedure between Super-Clusters and General Tracking Seeds (Either from \texttt{ElectronSeedProducer} or \texttt{ElectronNHitSeedProducer})
+    \item \textbf{GSF Track \--} A track from GSF-Tracking resulting from an \textbf{ECAL-Driven Seed}
+    \item \textbf{Seeding Efficiency \--} The fraction of \textbf{Sim-Tracks} that have a matching \textbf{ECAL-Driven Seed} (based on simhit-rechit linkage)
+    \item \textbf{GSF Tracking Efficiency \--} The fraction of \textbf{Sim-Tracks} that have a matching \textbf{GSF Track} (again, based on simhit-rechit linkage)
+    \item \textbf{ECAL-Driven Seed Purity \--} The fraction of \textbf{ECAL-Driven Seeds} that have a matching \textbf{Sim-Track}
+    \item \textbf{GSF Tracking Purity \--} The fraction of \textbf{GSF Tracks} that have a matching \textbf{Sim-Track}
+  \end{itemize}
+\end{frame}
+
+
+\begin{frame}{Matching Window Parameters}
+\begin{table}[]
+\centering
+\begin{tabular}{@{}llrrrr@{}}
+\toprule
+&  & \textbf{extra-narrow} & \textbf{narrow(HLT)} & \textbf{wide} & \textbf{extra-wide} \\ \midrule
+Hit 1 & dPhiMaxHighEt & \textbf{0.025} & \textbf{0.05} & \textbf{0.1} & \textbf{0.15} \\
+ & dPhiMaxHighEtThres & 20.0 & 20.0 & 20.0 & 20.0 \\
+ & dPhiMaxLowEtGrad & -0.002 & -0.002 & -0.002 & -0.002 \\
+ & dRzMaxHighEt & 9999.0 & 9999.0 & 9999.0 & 9999.0 \\
+ & dRzMaxHighEtThres & 0.0 & 0.0 & 0.0 & 0.0 \\
+ & dRzMaxLowEtGrad & 0.0 & 0.0 & 0.0 & 0.0 \\ \midrule
+Hit 2 & dPhiMaxHighEt & \textbf{0.0015} & \textbf{0.003} & \textbf{0.006} & \textbf{0.009} \\
+ & dPhiMaxHighEtThres & 0.0 & 0.0 & 0.0 & 0.0 \\
+ & dPhiMaxLowEtGrad & 0.0 & 0.0 & 0.0 & 0.0 \\
+ & dRzMaxHighEt & \textbf{0.025} & \textbf{0.05} & \textbf{0.1} & \textbf{0.15} \\
+ & dRzMaxHighEtThres & 30.0 & 30.0 & 30.0 & 30.0 \\
+ & dRzMaxLowEtGrad & -0.002 & -0.002 & -0.002 & -0.002 \\ \midrule
+Hit 3+ & dPhiMaxHighEt & \textbf{0.0015} & \textbf{0.003} & \textbf{0.006} & \textbf{0.009} \\
+ & dPhiMaxHighEtThres & 0.0 & 0.0 & 0.0 & 0.0 \\
+ & dPhiMaxLowEtGrad & 0.0 & 0.0 & 0.0 & 0.0 \\
+ & dRzMaxHighEt & \textbf{0.025} & \textbf{0.05} & \textbf{0.1} & \textbf{0.15} \\
+ & dRzMaxHighEtThres & 30.0 & 30.0 & 30.0 & 30.0 \\
+ & dRzMaxLowEtGrad & -0.002 & -0.002 & -0.002 & -0.002 \\ \bottomrule
+\end{tabular}
+\end{table}
+\centering
+\texttt{NHit} Seeding window parameters. Bold designates modified values.
+\end{frame}
+
+\backupend
+
+\end{document}

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