latex3.C

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/// \file
/// \ingroup tutorial_graphics
/// \notebook
/// \preview Example illustrating a TPaveText with Latex inside.
///
/// \macro_image
/// \macro_code
///
/// \author Rene Brun
 
void latex3()
{
 
   TCanvas *c1 = new TCanvas("c1");
   TPaveText *pt = new TPaveText(.05, .1, .95, .8);
 
   pt->AddText("#frac{2s}{#pi#alpha^{2}}  #frac{d#sigma}{dcos#theta} "
               "(e^{+}e^{-} #rightarrow f#bar{f} ) = #left| #frac{1}{1 - #Delta#alpha} "
               "#right|^{2} (1+cos^{2}#theta)");
 
   pt->AddText("+ 4 Re #left{ #frac{2}{1 - #Delta#alpha} #chi(s) "
               "#[]{#hat{g}_{#nu}^{e}#hat{g}_{#nu}^{f} "
               "(1 + cos^{2}#theta) + 2 #hat{g}_{a}^{e}#hat{g}_{a}^{f} cos#theta) } #right}");
 
   pt->AddText("+ 16#left|#chi(s)#right|^{2} "
               "#left[(#hat{g}_{a}^{e}^{2} + #hat{g}_{v}^{e}^{2})"
               "(#hat{g}_{a}^{f}^{2} + #hat{g}_{v}^{f}^{2})(1+cos^{2}#theta)"
               "+ 8 #hat{g}_{a}^{e} #hat{g}_{a}^{f} #hat{g}_{v}^{e}"
               "#hat{g}_{v}^{f}cos#theta#right] ");
 
   pt->SetLabel("Born equation");
   pt->Draw();
}