\unitlength=3bp%

\begin{center}
\begin{small}
\begin{feynartspicture}(80,30)(2,1)
%\FALabel(33.,69.96)[]{\large $u\quad u\quad \to\quad \nu_e\quad \nu_e\quad g$}

\FADiagram{}
\FAProp(0.,15.)(10.,5.5)(0.,){/Straight}{1}
\FALabel(3.19219,13.2012)[bl]{$q$}
\FAProp(0.,5.)(10.,13.)(0.,){/Straight}{-1}
\FALabel(3.17617,6.28478)[tl]{$q$}
\FAProp(20.,17.)(16.,13.5)(0.,){/Straight}{-1}
\FALabel(17.4593,15.9365)[br]{$\nu_l$}
\FAProp(20.,10.)(16.,13.5)(0.,){/Straight}{1}
\FALabel(17.4593,11.0635)[tr]{$\nu_l$}
\FAProp(20.,3.)(10.,5.5)(0.,){/Cycles}{0}
\FALabel(14.4543,2.54718)[t]{$\Pg$}
\FAProp(10.,5.5)(10.,13.)(0.,){/Straight}{1}
\FALabel(11.07,9.25)[l]{$q$}
\FAProp(10.,13.)(16.,13.5)(0.,){/Sine}{0}
\FALabel(12.8713,14.3146)[b]{$\PZ$}
\FAVert(10.,5.5){0}
\FAVert(10.,13.){0}
\FAVert(16.,13.5){0}

\FADiagram{}
\FAProp(0.,15.)(10.,13.)(0.,){/Straight}{1}
\FALabel(5.30398,15.0399)[b]{$q$}
\FAProp(0.,5.)(10.,5.5)(0.,){/Straight}{-1}
\FALabel(5.0774,4.18193)[t]{$q$}
\FAProp(20.,17.)(15.5,13.5)(0.,){/Straight}{-1}
\FALabel(17.2784,15.9935)[br]{$\nu_l$}
\FAProp(20.,10.)(15.5,13.5)(0.,){/Straight}{1}
\FALabel(18.2216,12.4935)[bl]{$\nu_l$}
\FAProp(20.,3.)(10.,5.5)(0.,){/Cycles}{0}
\FALabel(15.3759,5.27372)[b]{$\Pg$}
\FAProp(10.,13.)(10.,5.5)(0.,){/Straight}{1}
\FALabel(8.93,9.25)[r]{$q$}
\FAProp(10.,13.)(15.5,13.5)(0.,){/Sine}{0}
\FALabel(12.8903,12.1864)[t]{$\PZ$}
\FAVert(10.,13.){0}
\FAVert(10.,5.5){0}
\FAVert(15.5,13.5){0}

\end{feynartspicture}
\end{small}
\end{center}
