如何使用 Tikz-Feynman 创建底部括号装饰？

Question

我正在尝试在 Ti 的底部创建一个支架钾z Feynman，但无论我怎么尝试，支架仍然在底部。这是我所得到的：

这就是我想要的：

抱歉，注释有点粗体；我忘了更改画笔宽度。无论如何，我该如何将这个括号倒置？这是我当前的代码：

    \begin{tikzpicture}
        \begin{feynman}
            \vertex (i3) {\(u\)};
            \vertex [above right=of i3] (i4);
            \vertex [above left=of i4] (i5) {\(u\)};
            \vertex [right=0.5cm of i3] (i6) {\(d\)};
            \vertex [above right=of i6] (i7);
            \vertex [above left=of i7] (i8) {\(d\)};
            \vertex [right=0.5cm of i6] (a) {\(d\)};
            \vertex [above right=of a] (b);
            \vertex [above left=of b] (c) {\(u\)};
            \vertex [above right=of b] (d);
            \vertex [above right=of d] (e) {\(\overline{\nu}_e\)};
            \vertex [right=of d] (f);
            \vertex [above=0.2cm of f] (g) {\(e^-\)};
            \diagram* {
                (i3) -- [fermion] (i4) -- [fermion] (i5),
                (i6) -- [fermion] (i7) -- [fermion] (i8),
                (a) -- [fermion] (b) -- [fermion] (c),
                (b) -- [boson, edge label=$W^-$] (d) -- [anti fermion] (e),
                (d) -- [fermion] (g)
            };
            \draw [decoration={brace}, decorate] (i5.north west) -- (c.north east) node [pos=0.5, above] {\large \(p^+\)};
            \draw [decoration={brace}, decorate] (i3.south west) -- (a.south east) node [pos=0.5, above] {\large \(n^0\)};
        \end{feynman}
    \end{tikzpicture}

非常感谢您的帮助！

Answer 1

这当然不是最优雅的解决方案。我(i3.south west) -- (a.south east)用(i3.south west) -- (a.south east)和替换node [pos=0.5, above]了[pos=0.5, below]。

\documentclass{article}
\usepackage{tikz-feynman}
\begin{document}

    \begin{tikzpicture}
        \begin{feynman}
            \vertex (i3) {\(u\)};
            \vertex [above right=of i3] (i4);
            \vertex [above left=of i4] (i5) {\(u\)};
            \vertex [right=0.5cm of i3] (i6) {\(d\)};
            \vertex [above right=of i6] (i7);
            \vertex [above left=of i7] (i8) {\(d\)};
            \vertex [right=0.5cm of i6] (a) {\(d\)};
            \vertex [above right=of a] (b);
            \vertex [above left=of b] (c) {\(u\)};
            \vertex [above right=of b] (d);
            \vertex [above right=of d] (e) {\(\overline{\nu}_e\)};
            \vertex [right=of d] (f);
            \vertex [above=0.2cm of f] (g) {\(e^-\)};
            \diagram* {
                (i3) -- [fermion] (i4) -- [fermion] (i5),
                (i6) -- [fermion] (i7) -- [fermion] (i8),
                (a) -- [fermion] (b) -- [fermion] (c),
                (b) -- [boson, edge label=$W^-$] (d) -- [anti fermion] (e),
                (d) -- [fermion] (g)
            };
            \draw [decoration={brace}, decorate] (i5.north west) -- (c.north east) node [pos=0.5, above] {\large \(p^+\)};
            \draw [decoration={brace}, decorate] (a.south east) -- (i3.south west) node [pos=0.5, below] {\large \(n^0\)};
        \end{feynman}
    \end{tikzpicture}
    
    \end{document}