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使用 feynmf 绘制 gluino

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使用 feynmf 绘制 gluino

是否可以在 feynmf 中绘制胶子线而不是曲线或胶子线（胶子线是锯齿形的，里面有一条线，或者是曲线，里面有一条线）谢谢。

这是我的代码：

\begin{fmffile}{feynman/phase_space}
\begin{fmfgraph*}(150,100)
\fmfleft{p1,p2}
\fmfright{t1,t2,chi1,chi2,t3,t4}
\fmf{fermion}{p1,vp}
\fmf{fermion}{p2,vp}
\fmflabel{$ P $}{p1}
\fmflabel{$ P $}{p2}
\fmflabel{$ t $}{t1}
\fmflabel{$ \bar{t} $}{t2}
\fmflabel{$ t $}{t3}
\fmflabel{$ \bar{t} $}{t4}
\fmflabel{$ \widetilde{\chi}_1^0 $}{chi1}
\fmflabel{$ \widetilde{\chi}_1^0 $}{chi2}
\fmf{curly,label=$\widetilde{g}$, label.side=right, tension=2}{vp,vg1}
\fmf{curly,label=$\widetilde{g}$, label.side=left, tension=2}{vp,vg2}
\fmf{plain}{vg1,t1}
\fmf{plain}{t2,vg1}
\fmf{dashes}{vg1,chi1}
\fmf{plain}{vg2,t3}
\fmf{plain}{t4,vg2}
\fmf{dashes}{vg2,chi2}
\fmfblob{.15w}{vp}
\fmfdot{vg1,vg2}
\fmffreeze
\fmfi{plain}{vpath (__p1,__vp) shifted (thick*(0,2))}
\fmfi{plain}{vpath (__p1,__vp) shifted (thick*(1,-1.5))}
\fmfi{plain}{vpath (__p2,__vp) shifted (thick*(0,2))}
\fmfi{plain}{vpath (__p2,__vp) shifted (thick*(1,-3))}
\end{fmfgraph*}
\end{fmffile}

答案1

通过添加以下内容可以绘制胶合线：

\fmfi{plain}{vpath (__vp,__vg1) shifted (thick*(0,0))}
\fmfi{plain}{vpath (__vp,__vg2) shifted (thick*(0,0))}

以下是完整代码（略有改动）：

![\begin{fmffile}{phase_space1}
\begin{fmfgraph*}(150,120)
\fmfleft{p1,p2}
\fmfright{t1,t2,chi1,chi2,t4,t3}
\fmf{fermion}{p1,vp}
\fmf{fermion}{p2,vp}
\fmflabel{$ P $}{p1}
\fmflabel{$ P $}{p2}
\fmflabel{$ t $}{t1}
\fmflabel{$ \bar{t} $}{t2}
\fmflabel{$ t $}{t3}
\fmflabel{$ \bar{t} $}{t4}
\fmflabel{$ \widetilde{\chi}_i^0 $}{chi1}
\fmflabel{$ \widetilde{\chi}_i^0 $}{chi2}
\fmf{curly,label=$\widetilde{g}$, label.side=right, tension=2}{vp,vg1}
\fmf{curly,label=$\widetilde{g}$, label.side=left, tension=2}{vp,vg2}
\fmf{plain}{vg1,t1}
\fmf{plain}{t2,v1}
\fmf{dashes}{v1,chi1}
\fmf{plain}{vg2,t3}
\fmf{plain}{t4,v2}
\fmf{dashes}{v2,chi2}
\fmf{dashes,label=$\widetilde{t}_1^*$, label.side=left}{vg1,v1}
\fmf{dashes,label=$\widetilde{t}_1^*$, label.side=right}{vg2,v2}
\fmfblob{.15w}{vp}
\fmfdot{vg1,vg2}
\fmffreeze
\fmfi{plain}{vpath (__p1,__vp) shifted (thick*(0,2))}
\fmfi{plain}{vpath (__p1,__vp) shifted (thick*(1,-1.5))}
\fmfi{plain}{vpath (__p2,__vp) shifted (thick*(0,2))}
\fmfi{plain}{vpath (__p2,__vp) shifted (thick*(1,-3))}
\fmfi{plain}{vpath (__vp,__vg1) shifted (thick*(0,0))}
\fmfi{plain}{vpath (__vp,__vg2) shifted (thick*(0,0))}
\end{fmfgraph*}
\end{fmffile}

胶子衰变

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