$f_0[980]^{0}$ Two Body Decay Vertices(1)

There are 1 vertices in this part

Vertex 2: $f_0[980]^{0}({p_1})~-\pi^-({p_2})~-\pi^+({p_3})~$

\begin{eqnarray*}
&V_{2}=f_{28}g
\end{eqnarray*}