Resolve "pi0 resolution for ECal barrel"

Closes #19 (closed)

benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx

@@ -200,9 +200,9 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   c5->SaveAs("results/emcal_barrel_pions_pid.pdf");
 
   //Energy Resolution Calculation
-  auto hdE          = d2.Histo1D({"hdE",      "dE; dE[GeV]; Events",              20, -7.5, 7.5}, "dE");//changed from 100
-  auto hdE_rel      = d2.Histo1D({"hdE_rel",  "dE Relative; dE Relative; Events", 20, -2, 2}, "dE_rel");//changed from 100
-  hdE->Fit("gaus", "", "", -2,  2);
+  auto hdE          = d2.Histo1D({"hdE",      "dE; dE[GeV]; Events",              20, -2.5, 2.5}, "dE");//changed from 100
+  auto hdE_rel      = d2.Histo1D({"hdE_rel",  "dE Relative; dE Relative; Events", 20, -2.5, 2.5}, "dE_rel");//changed from 100
+  hdE->Fit("gaus", "", "", -2.5,  2.5);
   double* res       = hdE->GetFunction("gaus")->GetParameters();
   double sigmaOverE = res[2] / thrown_energy;