Resolve "pi0 resolution for ECal barrel"

Closes #19 (closed)

benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx

@@ -123,9 +123,11 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   // Returns the pdgID of the particle daughters(hopefully?)
   auto getdau = [](std::vector<dd4pod::Geant4ParticleData> const& input) {
     std::vector<double> result;
+    /*
     for (auto part : input[2].daughters_begin)
-      result.push_back(part)
-    return result;
+      result.push_back(*part)
+      */
+    return *input[2].daughters_begin;
   };
 
   // Define variables
@@ -134,7 +136,7 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
               .Define("Esim",   Esim,       {"EcalBarrelHits"})
               .Define("fsam",   fsam,       {"Esim","Ethr"})
               .Define("pid",    getpid,     {"mcparticles"})
-              .Define("dau",    getd,       {"mcparticles"})
+              .Define("dau",    getdau,     {"mcparticles"})
               ;
 
   // Define Histograms
@@ -143,7 +145,7 @@ 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 hpid2  = d1.Histo1D({"hpid2",   "PID; PID; Count",                                  100,  -220,   220}, "dau");
 
   // Set sampling Fraction, ideally this will be taken from a json file 
   cout << "The sampling fraction mean is " << samp_frac << endl;
@@ -215,8 +217,8 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   hpid2->SetLineWidth(2);
   hpid2->SetLineColor(kBlue);
   hpid2->DrawClone();
-  c6->SaveAs("results/emcal_barrel_pions_pid.png");
-  c6->SaveAs("results/emcal_barrel_pions_pid.pdf");
+  c6->SaveAs("results/emcal_barrel_pions_pid2.png");
+  c6->SaveAs("results/emcal_barrel_pions_pid2.pdf");
 
   //Energy Resolution Calculation
   auto hdE          = d2.Histo1D({"hdE",      "dE; dE[GeV]; Events",              20, -2.5, 2.5}, "dE");//changed from 100