![费曼图:两侧互换](https://linux22.com/image/392454/%E8%B4%B9%E6%9B%BC%E5%9B%BE%EF%BC%9A%E4%B8%A4%E4%BE%A7%E4%BA%92%E6%8D%A2.png)
在我的 t 通道费曼图中(使用 tikz-Feynman),t 通道的下方两个粒子被切换。看来,对于 s 通道,右侧粒子也被切换了。
T 通道代码:
\documentclass[a4paper]{article}
\usepackage{physics}
\usepackage{graphicx}
\usepackage[compat=1.1.0]{tikz-feynman}
\begin{document}
t-channel
\[\feynmandiagram [large, vertical=a to b] {
i1 [particle=\(\nu\)] -- [fermion, momentum=\(q\)] a -- [boson, momentum=\(k\)] f1 [particle=\(W^+\)],
a -- [fermion, momentum=\(p\)] b,
i2 [particle=\(\bar\nu\)] -- [anti fermion, momentum=\(q'\)] b,
b -- [boson, momentum=\(k'\)] f2 [particle=\(W^-\)],
};
\]
\end{document}
预期输出:
得到:
如何修复此问题?
答案1
你只需要交换下面两个粒子的顺序。
\[\feynmandiagram [large, vertical=a to b] {
i1 [particle=\(\nu\)] -- [fermion, momentum=\(q\)] a -- [boson, momentum=\(k\)] f1 [particle=\(W^+\)],
a -- [fermion, momentum=\(p\)] b,
b -- [boson, momentum=\(k'\)] f2 [particle=\(W^-\)],
i2 [particle=\(\bar\nu\)] -- [anti fermion, momentum=\(q'\)] b,
};
\]