Resolve "pi0 resolution for ECal barrel"

Closes #19 (closed)

benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx

@@ -41,7 +41,8 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   std::string test_tag = "Barrel_emcal_pi0";
   //TODO: Change test_tag to something else
   std:string detector = "Barrel_emcal";
-  //Energy resolution in teh barrel region(-1 < eta < 1)
+  // Energy resolution in the barrel region(-1 < eta < 1)
+  // Taken from : Initial considerations for EMCal of the EIC detector by A. Bazilevsky
   // sigma_E / E = 12% / E^0.5 convoluted with 2%
   // sigma_E / E = [ (0.12/E^0.5)^2 + 0.02^2]^0.5, with E in [GeV]
   double thrown_energy = 5; // Current thrown energy, will need to grab from json file
@@ -120,14 +121,9 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
     return input[2].pdgID;
   };
 
-  // Returns the pdgID of the particle daughters(hopefully?)
+  // Returns number of particle daughters
   auto getdau = [](std::vector<dd4pod::Geant4ParticleData> const& input) {
-    std::vector<double> result;
-    /*
-    for (auto part : input[2].daughters_begin)
-      result.push_back(*part)
-      */
-    return *input[2].daughters_begin;
+    return input[2].daughters_begin;
   };
 
   // Define variables
@@ -145,19 +141,15 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   auto hEsim  = d1.Histo1D({"hEsim",  "Energy Deposit; Energy Deposit [GeV]; Events",      100,  0.0,    1.0}, "Esim");
   auto hfsam  = d1.Histo1D({"hfsam",  "Sampling Fraction; Sampling Fraction; Events",      100,  0.0,    0.1}, "fsam");
   auto hpid   = d1.Histo1D({"hpid",   "PID; PID; Count",                                   100,  -220,   220}, "pid");
-  auto hpid2  = d1.Histo1D({"hpid2",   "PID; PID; Count",                                  100,  -220,   220}, "dau");
+  auto hdau   = d1.Histo1D({"hdau",   "Number of Daughters; Number of Daughters; Count",   10,   0,      10},  "dau");
 
   // Set sampling Fraction, ideally this will be taken from a json file 
-  cout << "The sampling fraction mean is " << samp_frac << endl;
   samp_frac = hfsam -> GetMean();
-  cout << "The sampling fraction mean is " << samp_frac << endl;
 
   auto d2 = d1.Define("dE",     eResol,     {"Esim","Ethr"})
               .Define("dE_rel", eResol_rel, {"Esim","Ethr"})
               ;
 
-
-
   // Event Counts
   auto nevents_thrown      = d1.Count();
   std::cout << "Number of Thrown Events: " << (*nevents_thrown) << "\n";
@@ -213,12 +205,12 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
 
   TCanvas *c6 = new TCanvas("c6", "c6", 700, 500);
   c5->SetLogy(1);
-  hpid2->GetYaxis()->SetTitleOffset(1.4);
-  hpid2->SetLineWidth(2);
-  hpid2->SetLineColor(kBlue);
-  hpid2->DrawClone();
-  c6->SaveAs("results/emcal_barrel_pions_pid2.png");
-  c6->SaveAs("results/emcal_barrel_pions_pid2.pdf");
+  hdau->GetYaxis()->SetTitleOffset(1.4);
+  hdau->SetLineWidth(2);
+  hdau->SetLineColor(kBlue);
+  hdau->DrawClone();
+  c6->SaveAs("results/emcal_barrel_pions_dau.png");
+  c6->SaveAs("results/emcal_barrel_pions_dau.pdf");
 
   //Energy Resolution Calculation
   auto hdE          = d2.Histo1D({"hdE",      "dE; dE[GeV]; Events",              20, -2.5, 2.5}, "dE");//changed from 100