Diagram of steps in CMS analysis. opendata.cern.ch/docs/cms-mc-production-overview

cms-mc-production-overview-diagram.tex

\documentclass{standalone}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{fit}
\usetikzlibrary{positioning}


\begin{document}
\begin{tikzpicture}[nodes={draw, % General options for all nodes
                          line width=1pt,
                          anchor=center, 
                          text centered,
                          rounded corners,
                          minimum width=1.5cm, minimum height=8mm},
                   ]
% box styles
\tikzset{txt/.style={text width=1.5cm, anchor=center}};
\tikzset{txt2/.style={text width=1.8cm, anchor=center}};
\tikzset{txt3/.style={text width=2cm, anchor=center}};
\tikzset{txt4/.style={text width=2.2cm, anchor=center}};
\tikzset{TXT/.style={anchor=center}};
\tikzset{blue dotted/.style={draw=blue!50!white, line width=1pt, dash pattern=on 1pt off 4pt on 6pt off 4pt, inner sep=4mm, rectangle, rounded corners}};
\tikzset{dashes/.style={draw=black!37!white, line width=1pt, dash pattern=on 1pt off 4pt on 1pt off 4pt, inner sep=4mm, rectangle, rounded corners}};
\tikzset{empty/.style={draw=none}};


% gen step
\node[txt3]  (pythia)                              {General purpose generator};
\node[TXT]   (hadronization)  [right=2 of pythia]  {Hadronization};
\node[txt]   (guns)           [below=of pythia]    {Particle guns};
\node[txt]   (meGen)          [right=0.8 of guns]  {Matrix Element generator};
\node[txt]   (lhe)            [right=0.8 of meGen] {LHE};

\node[blue dotted, fit = (guns) (lhe) (hadronization)] (gen) {};
\node[empty] at (gen.north) [above, inner sep=3mm]           {\textbf{GEN}};

\draw[->, ultra thick] (pythia) to                  (hadronization);
\draw[->, ultra thick] (guns)   to [out=50, in=210] (hadronization);
\draw[->, ultra thick] (meGen)  to                  (lhe);
\draw[->, ultra thick] (lhe)    to [out=90, in=270] (hadronization);


% sim step
\node[txt2] (geant)    [right=1.5 of hadronization] {Detector simulation};
\node[txt2] (digi)     [right=of geant]             {Digitization};
\node[txt2] (L1sim)    [right=of digi]              {L1 trigger simulation};
\node[txt]  (digi2raw) [below=of L1sim]             {Digi2raw};
\node[txt2] (HLTsim)   [left=of digi2raw]           {HLT simulation};
\node[txt2] (pileUp)   [below=of geant]             {Pile-up simulation};

\node[blue dotted, fit = (geant) (L1sim) (digi2raw)] (sim) {};
\node[empty] at (sim.north) [above, inner sep=3mm]         {\textbf{SIM}};

\draw[->, ultra thick] (hadronization) -- (geant);
\draw[->, ultra thick] (geant)         -- (digi);
\draw[->, ultra thick] (digi)          -- (L1sim);
\draw[->, ultra thick] (L1sim)         -- (digi2raw);
\draw[->, ultra thick] (digi2raw)      -- (HLTsim);
\draw[->, ultra thick] (pileUp)        to [out=60, in=270] (digi);


% data aquisition step
\node[txt] (protons)  [below=1.5 of guns] {Beam Colisions};
\node[txt] (detector) [right=of protons]  {Detectors};
\node[txt] (L1)       [right=of detector] {L1 Trigger};
\node[txt] (HLT)      [right=of L1]       {High Level Trigger};

\node[blue dotted, fit = (protons) (detector) (HLT)] (data) {};
\node[empty] at (data.south) [below, inner sep=3mm]         {\textbf{CMS Experiment}};

\draw[->, ultra thick] (protons)  -- (detector);
\draw[->, ultra thick] (detector) -- (L1);
\draw[->, ultra thick] (L1)       -- (HLT);


% reco step
\node[txt4] (reco1) [right=of HLT]  {Event reconstruction};

\node[blue dotted, fit = (reco1)] (reco) {};
\node[empty] at (reco.south) [below, inner sep=3mm] {\textbf{RECO}};

\draw[->, ultra thick] (HLTsim) to [out=180, in=170] (reco1);
\draw[->, ultra thick] (HLT)    to [out=0,   in=180] (reco1);


% analysis step
\node[txt] (analysis) [right=of reco1] {Custom software};

\node[blue dotted, fit = (analysis)] (Analysis) {};
\node[empty] at (Analysis.south) [below, inner sep=3mm] {\textbf{Data Analysis}};

\draw[->, ultra thick] (reco1) -- (analysis);

% spaces to make diagram more pleasent for the eyes
\node[empty, minimum width=0.1cm] (void) [left=0.35 of pythia] {}; % left
%\node[empty, minimum width=0.1cm] (void) [right=0.3 of HLTsim] {}; % right
\end{tikzpicture}
\end{document}

compilation.sh

# make tex into pdf
pdflatex cms-mc-production-overview-diagram.tex
# convert pdf to png
convert -verbose -density 300 -trim cms-mc-production-overview-diagram.pdf -quality 100 -flatten -sharpen 0x1.0 -transparent white diagram.png

diagram.png