muzimuzhi
commented
5 years ago Labeling vertex as their respective internal names gives us more info. In the package document, vertices i1 and i2 are both at the left side of a -- b; but this is not true in your output, nor in my local output.
According to the document of tikz-feynman, the only constraint in this example is that, groups of vertices i1 f1 a and i2 f2 b are positioned closer together (by using [draw=none]). However, the default behavior of whether vertices i1 and i2 are both at the same side of a -- b or not, is determined by the undergoing positioning algorithm. Therefore your output and the output in doc may both be ok.
I am not capable of finding the real cause of this difference, but currently "reversing the drawing routine of group consisting i2, f2 and b" could be a workaround.
% workaround
\begin{tikzpicture}
\begin{feynman}
\diagram[vertical=a to b] {% change from flipped `vertical'` to normal `vertical`
i1 [particle=\(e^{-}\)]
-- [fermion] a
-- [draw=none] f1 [particle=\(e^{+}\)],
a -- [photon, edge label'=\(p\)] b,
% draw reversely
f2 [particle=\(e^{-}\)]
-- [draw=none] b
-- [anti fermion] i2 [particle=\(e^{+}\)],
};
\diagram* {
(a) -- [fermion] (f2),
(b) -- [anti fermion] (f1),
};
\end{feynman}
\end{tikzpicture}
70akaline
stone-zeng
Liam0205
hmenke
Dear All, I met a problem when compiling codes with TikZ-Feynman package, my codes is shown below
When I compile this with LuaTeX in TeXPad, the diagram shown is not the same as the example from document:
Mine:
Document example
How can I compile this file properly?