Particle decay (TikZ)

Feynman diagrams have a specific visual grammar, and tikz-feynman is the tool that gets it right. This is beta decay.

#What this example shows

tikz-feynman, with its own diagram environment.
Fermion, boson and anti-fermion lines drawn differently.
Vertex labels in maths mode.

#A worked example

Open it, edit it, or copy the source below.

The source, which you can paste into a new diagram and edit:

\documentclass[border=6pt]{standalone}
\usepackage{tikz-feynman}
\begin{document}
\feynmandiagram [horizontal=a to b] {
  i1 [particle=\(d\)] -- [fermion] a -- [fermion] f1 [particle=\(u\)],
  a -- [boson, edge label=\(W^{-}\)] b,
  b -- [anti fermion] f2 [particle=\(\bar{\nu}_e\)],
  b -- [fermion] f3 [particle=\(e^{-}\)],
};
\end{document}

#Making it your own

Line style carries meaning: fermion, anti fermion, boson and scalar are not interchangeable.
Rendering TikZ is slower than every other language here.
Compilation errors come from TeX and often point one line further on than the mistake.

State transition diagram (TikZ)

An automaton, with publication-quality output.

Circuit diagram (TikZ)

A real schematic, drawn with circuitikz.

TikZ examples

Back to the rest of these examples.

Exact, or not worth drawing.