Can't get diagram quite right

[g0chan]

Hi JP! I need some help with my code. I'm trying to recreate Fig. 1 from the following paper: https://arxiv.org/pdf/1801.08627.pdf

A past group member made the images without using tikz feynman so I'm trying to recreate them using the package. I have the following:

\begin{tikzpicture}
\begin{feynman}
\vertex (a) {\(p_1\)};
\vertex[below right=of a](a1);
\vertex[below=1in of a1](b1);
\vertex[below left=of b1](b){\(p_2\)};
\vertex[right=1in of a1](c1);
\vertex[above right=of c1](c){\(p_3\)};
\vertex[right=1in of b1](d1);
\vertex[below right=of d1](d){\(p_4\)}; 
\diagram* {
	(a) -- [fermion] (a1) ,
	(b) -- [fermion] (b1),
	(c1) -- [fermion] (c),
	(d1) -- [fermion] (d),
	(a1) -- [fermion, half left] (c1)
	(c1) -- [fermion, half left] (d1)
	(d1) -- [fermion, half left] (b1)
	(b1) -- [fermion, half left] (a1)
};
\end{feynman}
\end{tikzpicture}

But it's not coming out quite right. Any help you can provide would be great. Thank you!

[JP-Ellis]

Hi,

Since you each arc covers a quarter of a full circle, you probably should be using the quarter left style instead of the half left.

\RequirePackage{luatex85}
\documentclass[tikz]{standalone}

\usepackage[version=1.1.0]{tikz-feynman}

\begin{document}
\begin{tikzpicture}
\begin{feynman}
\vertex (a) {\(p_1\)};
\vertex[below right=of a](a1);
\vertex[below=1in of a1](b1);
\vertex[below left=of b1](b){\(p_2\)};
\vertex[right=1in of a1](c1);
\vertex[above right=of c1](c){\(p_3\)};
\vertex[right=1in of b1](d1);
\vertex[below right=of d1](d){\(p_4\)};
\diagram* {
	(a) -- [fermion] (a1) ,
	(b) -- [fermion] (b1),
	(c1) -- [fermion] (c),
	(d1) -- [fermion] (d),
	(a1) -- [fermion, quarter left] (c1)
	(c1) -- [fermion, quarter left] (d1)
	(d1) -- [fermion, quarter left] (b1)
	(b1) -- [fermion, quarter left] (a1)
};
\end{feynman}
\end{tikzpicture}
\end{document}

Josh

[g0chan]

Thank you!!

…

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