Resolve "pi0 resolution for ECal barrel"

Closes #19 (closed)

benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx

@@ -55,6 +55,9 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame d0("events", input_fname);
 
+  // Sampling Fraction
+  double samp_frac = 1.0;
+
   // Thrown Energy [GeV]
   auto Ethr = [](std::vector<dd4pod::Geant4ParticleData> const& input) {
     std::vector<double> result;
@@ -86,53 +89,56 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
     return result;
   };
 
-  // Energy Resolution = Esampling - Ethrown
-  auto eResol = [](const std::vector<double>& sampled, const std::vector<double>& thrown) {
+  // Energy Resolution = Esampling/Sampling_fraction - Ethrown
+  auto eResol = [samp_frac](const std::vector<double>& sampled, const std::vector<double>& thrown) {
     std::vector<double> result;
     auto it_sam = sampled.cbegin();
     auto it_thr = thrown.cbegin();
     for (; it_sam != sampled.end() && it_thr != thrown.end(); ++it_sam, ++it_thr) {
-        result.push_back(*it_sam - *it_thr);
+        result.push_back(*it_sam / samp_frac - *it_thr);
     }
     return result;
   };
 
-  // Relative Energy Resolution = (Esampling - Ethrown)/Ethrown
-  auto eResol_rel = [](const std::vector<double>& sampled, const std::vector<double>& thrown) {
+  // Relative Energy Resolution = (Esampling/Sampling fraction - Ethrown)/Ethrown
+  auto eResol_rel = [samp_frac](const std::vector<double>& sampled, const std::vector<double>& thrown) {
     std::vector<double> result;
     auto it_sam = sampled.cbegin();
     auto it_thr = thrown.cbegin();
     for (; it_sam != sampled.end() && it_thr != thrown.end(); ++it_sam, ++it_thr) {
-        result.push_back((*it_sam - *it_thr) / *it_thr);
+        result.push_back((*it_sam / samp_frac - *it_thr) / *it_thr);
     }
     return result;
   };
 
-  // Relative Energy Resolution = (Esampling - Ethrown)/Ethrown
+  // Returns the pdgID of the particle
   auto getpid = [](std::vector<dd4pod::Geant4ParticleData> const& input) {
     return input[2].pdgID;
   };
 
   // Define variables
-  auto d1 = d0.Define("Ethr",  Ethr,  {"mcparticles"})
-	      .Define("nhits",  nhits,      {"EcalBarrelHits"})
-	      .Define("Esim",   Esim,       {"EcalBarrelHits"})
-        .Define("Esim_hcal",   Esim,       {"HcalBarrelHits"})
-        .Define("Esim_crycal",   Esim,       {"CrystalEcalHits"})
-        .Define("fsam",   fsam,       {"Esim","Ethr"})
-        .Define("dE",     eResol,     {"Esim","Ethr"})
-        .Define("dE_rel", eResol_rel, {"Esim","Ethr"})
-        .Define("pid", getpid, {"mcparticles"})
-	      ;
+  auto d1 = d0.Define("Ethr",   Ethr,       {"mcparticles"})
+              .Define("nhits",  nhits,      {"EcalBarrelHits"})
+              .Define("Esim",   Esim,       {"EcalBarrelHits"})
+              .Define("fsam",   fsam,       {"Esim","Ethr"})
+              .Define("pid",    getpid,     {"mcparticles"})
+              ;
 
   // Define Histograms
   auto hEthr  = d1.Histo1D({"hEthr",  "Thrown Energy; Thrown Energy [GeV]; Events",        100,  0.0,    7.5}, "Ethr");
   auto hNhits = d1.Histo1D({"hNhits", "Number of hits per events; Number of hits; Events", 100,  0.0, 2000.0}, "nhits");
   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 hhcal  = d1.Histo1D({"hhcal",  "Energy Deposit; Energy Deposit [GeV]; Events",      100,  0.0,    1.0}, "Esim_hcal");
-  auto hcrycal  = d1.Histo1D({"hcrycal",  "Energy Deposit; Energy Deposit [GeV]; Events",      100,  0.0,    1.0}, "Esim_crycal");
+  auto hpid   = d1.Histo1D({"hpid",   "PID; PID; Count",                                   100,  -220,   220}, "pid");
+
+  // Set sampling Fraction, ideally this will be taken from a json file 
+  samp_frac = hfsam -> GetMean();
+
+  auto d2 = d1.Define("dE",     eResol,     {"Esim","Ethr"})
+              .Define("dE_rel", eResol_rel, {"Esim","Ethr"})
+              ;
+
+
 
   // Event Counts
   auto nevents_thrown      = d1.Count();
@@ -187,27 +193,9 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   c5->SaveAs("results/emcal_barrel_pions_pid.png");
   c5->SaveAs("results/emcal_barrel_pions_pid.pdf");
 
-  TCanvas *c6 = new TCanvas("c6", "c6", 700, 500);
-  c6->SetLogy(1);
-  hhcal->GetYaxis()->SetTitleOffset(1.4);
-  hhcal->SetLineWidth(2);
-  hhcal->SetLineColor(kBlue);
-  hhcal->DrawClone();
-  c6->SaveAs("results/emcal_barrel_pions_hcal.png");
-  c6->SaveAs("results/emcal_barrel_pions_hcal.pdf");
-
-  TCanvas *c7 = new TCanvas("c7", "c7", 700, 500);
-  c7->SetLogy(1);
-  hcrycal->GetYaxis()->SetTitleOffset(1.4);
-  hcrycal->SetLineWidth(2);
-  hcrycal->SetLineColor(kBlue);
-  hcrycal->DrawClone();
-  c7->SaveAs("results/emcal_barrel_pions_crycal.png");
-  c7->SaveAs("results/emcal_barrel_pions_crycal.pdf");
-
   //Energy Resolution Work
-  auto hdE          = d1.Histo1D({"hdE",      "dE; dE[GeV]; Events",              20, -7.5, 7.5}, "dE");//changed from 100
-  auto hdE_rel      = d1.Histo1D({"hdE_rel",  "dE Relative; dE Relative; Events", 20, -2, 2}, "dE_rel");//changed from 100
+  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_rel->Fit("gaus", "", "", -2,  2);
   double* res       = hdE_rel->GetFunction("gaus")->GetParameters();