adding missing pieces

tikz-feynman/.gitignore

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+*.bak
+*.sav

tikz-feynman/a.tex

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+
+\documentclass[11pt]{article}
+% \usepackage{amssymb} %maths
+% \usepackage{amsmath} %maths
+% \usepackage[utf8] %useful to type directly diacritic characters
+\usepackage{tikz-feynman} 
+\tikzfeynmanset{compat=1.0.0}
+
+\begin{document}
+
+\feynmandiagram [horizontal=a to b] {
+  i1 -- [fermion] a -- [fermion] i2,
+  a -- [photon] b,
+  f1 -- [fermion] b -- [fermion] f2,
+};
+
+\feynmandiagram [horizontal=a to b] {
+  i1 [particle=\(e^{-}\)] -- [fermion] a -- [fermion] i2 [particle=\(e^{+}\)],
+  a -- [photon, edge label=\(\gamma\), momentum'=\(k\)] b,
+  f1 [particle=\(\mu^{+}\)] -- [fermion] b -- [fermion] f2 [particle=\(\mu^{-}\)],
+};
+  
+\end{document}

tikz-feynman/b.tex

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+\documentclass{standalone}
+\usepackage{tikz}
+\usepackage{tikz-feynman} 
+\begin{document}
+\begin{tikzpicture}
+  \draw (0,0) rectangle (2,1) node [midway] {Example};
+\end{tikzpicture}
+\end{document}

tikz-feynman/d.tex

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+\documentclass[11pt]{standalone}
+% \usepackage{amssymb} %maths
+% \usepackage{amsmath} %maths
+% \usepackage[utf8] %useful to type directly diacritic characters
+\usepackage{tikz-feynman} 
+% \tikzfeynmanset{compat=1.0.0}
+
+\begin{document}
+\begin{tikzpicture}[]
+  \begin{feynman}
+    \vertex (a);
+    \vertex [below=of a] (b);
+    \vertex [below left=of b] (c);
+    \vertex [below right=of b] (d);
+
+    \diagram * {
+      (a) -- [photon, edge label=\(\gamma\)] (b);
+      (c) -- [fermion, edge label=\(\mu\)] (b);
+      (b) -- [fermion, edge label=\(\mu\)] (d);
+    };
+  \end{feynman}
+\end{tikzpicture}
+\end{document}

tikz-feynman/d2.tex

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+\documentclass[11pt]{standalone}
+% \usepackage{amssymb} %maths
+% \usepackage{amsmath} %maths
+% \usepackage[utf8] %useful to type directly diacritic characters
+\usepackage{tikz-feynman} 
+% \tikzfeynmanset{compat=1.0.0}
+
+\begin{document}
+\begin{tikzpicture}[]
+  \begin{feynman}
+    \vertex (a);
+    \vertex [below=of a] (b);
+    \vertex [below left=of b] (c);
+    \vertex [below left=of c] (e);
+    \vertex [below right=of b] (d);
+    \vertex [below right=of d] (f);
+
+    \diagram * {
+      (a) -- [photon, edge label=\(\gamma\)] (b);
+      (c) -- [fermion, edge label=\(\mu\)] (b);
+      (e) -- [fermion] (c);
+      (b) -- [fermion, edge label=\(\mu\)] (d);
+      (d) -- [fermion] (f);
+      (c) -- [photon] (d);
+    };
+  \end{feynman}
+\end{tikzpicture}
+\end{document}

tikz-feynman/gm2-dirac.tex

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+\documentclass[11pt]{standalone}
+% \usepackage{amssymb} %maths
+% \usepackage{amsmath} %maths
+% \usepackage[utf8] %useful to type directly diacritic characters
+\usepackage{tikz-feynman} 
+% \tikzfeynmanset{compat=1.0.0}
+
+\begin{document}
+
+\feynmandiagram [vertical=a to b] {
+  % a [crossed dot] -- [photon, thick, edge label=\(\gamma\)] b [dot],
+  a -- [photon, thick, edge label=\(\gamma\)] b,
+  i1 [particle=\(\mu\)] -- [fermion, thick] b -- [fermion, thick] f1 [particle=\(\mu\)],
+  % f1 -- [fermion] b -- [fermion] f2,
+};
+
+% \feynmandiagram [horizontal=a to b] {
+  % i1 [particle=\(e^{-}\)] -- [fermion] a -- [fermion] i2 [particle=\(e^{+}\)],
+  % a -- [photon, edge label=\(\gamma\), momentum'=\(k\)] b,
+  % f1 [particle=\(\mu^{+}\)] -- [fermion] b -- [fermion] f2 [particle=\(\mu^{-}\)],
+% };
+  
+\end{document}

tikz-feynman/gm2-schwinger.tex

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+\documentclass[11pt]{standalone}
+% \usepackage{amssymb} %maths
+% \usepackage{amsmath} %maths
+% \usepackage[utf8] %useful to type directly diacritic characters
+\usepackage{tikz-feynman} 
+% \tikzfeynmanset{compat=1.0.0}
+
+\begin{document}
+
+\feynmandiagram [vertical=a to b] {
+  % a [crossed dot] -- [photon, thick, edge label=\(\gamma\)] b [dot],
+  a -- [photon, thick, edge label=\(\gamma\)] b,
+  i1 [particle=\(\mu\)] -- [fermion, thick] iv1 -- [fermion, thick] b 
+  -- [fermion, thick] iv2 -- [fermion, thick] f1 [particle=\(\mu\)],
+  {[same layer] iv1 -- [photon, thick] iv2},
+};
+
+% \feynmandiagram [horizontal=a to b] {
+  % i1 [particle=\(e^{-}\)] -- [fermion] a -- [fermion] i2 [particle=\(e^{+}\)],
+  % a -- [photon, edge label=\(\gamma\), momentum'=\(k\)] b,
+  % f1 [particle=\(\mu^{+}\)] -- [fermion] b -- [fermion] f2 [particle=\(\mu^{-}\)],
+% };
+  
+\end{document}