I would like to create a Feynman diagram of a beta decay using the package [compat=1.1.0]{tikz-feynman}, but I don't know how. Can someone give me an example? Thanks :)

I would like to draw a diagram like this, I've already found examples that uses other packages that I don't know how to use. enter image description here

1 Answer 1


Something like this?

\begin{tikzpicture}[x=15mm, y=15mm]
    \vertex (i1) {\(u\)};
    \vertex[right=.15 of i1] (i2) {\(d\)};
    \vertex[right=.15 of i2] (i3) {\(d\)};
    \vertex[below=.3 of i2] (n) {\(n\)};

    \vertex[above=2 of i1] (f1) {\(u\)};
    \vertex[right=.15 of f1] (f2) {\(d\)};
    \vertex[right=.15 of f2] (f3) {\(u\)};
    \vertex[above=.3 of f2] (p) {\(p\)};

    \vertex[above=1 of i3] (a);
    \vertex[right=.15 of a] (b);
    \vertex[right=.15 of b] (c);

    \vertex at ($(c) + (1,.25)$) (d);
    \vertex at ($(d) + (.2, 1)$) (f4) {\(\bar{\nu}_e\)};
    \vertex at ($(d) + (.9,.5)$) (f5) {\(e^-\)};
    (i1) -- [fermion] (a) -- [fermion] (f1),
    (i2) -- [fermion] (b) -- [fermion] (f2),
    (i3) -- [fermion, thick] (c) -- [fermion, thick] (f3),
    (c) -- [boson, edge label'=\(W^-\), thick] (d) -- [fermion, thick] (f5),
    (d) -- [anti fermion, thick] (f4),

\draw[-stealth] (-.4,-.4) -- (-.4,2.2);
\node at (-.4,2.3) {\(t\)};
  • Yes, thanks you :). I dont know how to create this more complex diagrams Oct 6, 2021 at 15:51
  • 1
    @GabrielVian there are lots of examples in the documentation of the package, you should take a look!
    – Vincent
    Oct 6, 2021 at 16:05

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