void fftt()
{
   //
   // e+e- -> ffbar with ttbar loop
   //
   TCanvas *c1 = new TCanvas("fftt", "e+e- -> fftt", 740,40, 400, 300);
   c1->SetFillColor(10);
   c1->SetBorderSize(0);
   c1->SetBorderMode(0);
   c1->Range(0, 0, 90, 60);
   Int_t linsav = gStyle->GetLineWidth();
   gStyle->SetLineWidth(3);
   TLatex t;
   t.SetTextAlign(22);
   t.SetTextSize(0.1);
   TLine * l;

   // Incoming e+e-
   l = new TLine(10, 10, 30, 30); l->Draw();
   l = new TLine(10, 50, 30, 30); l->Draw();

   t.DrawLatex(7,6,"e^{-}");
   t.DrawLatex(7,55,"e^{+}");

   // Z propagator
   lc = new TCurlyLine(30, 30, 38.5, 30);
   lc->SetWavy();
   lc->Draw();
   lc = new TCurlyLine(46.5, 30, 55, 30);
   lc->SetWavy();
   lc->Draw();
   t.DrawLatex(35.5, 25.0,"Z^{0}");
   t.DrawLatex(50.5, 25.0,"Z^{0}");

   //ttbar Loop
   TArc *hloop = new TArc(42.5,30,4);
   hloop->Draw();
   t.DrawLatex(42.5, 38.0,"t");
   t.DrawLatex(42.5, 21.5,"#bar{t}");

   // Outgoing ffbar
   l = new TLine(55, 30, 75, 10); l->Draw();
   l = new TLine(55, 30, 75, 50); l->Draw();

   t.DrawLatex(80,6,"f");
   t.DrawLatex(80,55,"#bar{f}");

   c1->Update();
   gStyle->SetLineWidth(linsav);
}