Drawing simple Feynman diagrams with feynhand.sty

Question

I just started TeXing feynman diagrams using Overleaf. I am using tikz-feynhand.sty which allows me to compile with pdflatex. I would like to write the following graph

\documentclass[reqno]{amsart}
 \usepackage{tikz-feynhand}
 \begin{document}
 \begin{equation}
 \begin{tikzpicture}
  \begin{feynhand}
   \vertex[ringdot,label=above:{s}] (v) at (0,0) {};
    \vertex[right=of v] (f1) ; 
    \vertex [above left=of v] (i1);
    \vertex [below left=of v] (i2);
    \propag [fermion, momentum'=\(p_1\)] (i1) to (v);
    \propag [anti fermion,momentum'=\(p_2\)] (i2) to (v);
    \propag [boson, momentum'=\(p_3\)] (v) to (f1);
 \end{feynhand}
\end{tikzpicture}
\end{equation}
\end{document}

In shorthand notation, similarly as it can be found in this thread. The reason, I'm not using tikz-feynman is that it requires luatex. I tried using \graph, but I struggle getting vertices displayed correctly, including the above used ringdot-style, e.g.. Thank you very much in advance! P.S.: How can I display latex output, including tikz in this forum?