Nus18SystsBeamTranspLoad.C

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/////////////////////////////////////////////////////////////////////
// Beam Transport systematics for Nus18
//
// Author: Sijith Edayath
// Modified by Mike Wallbank (wallbank@fnal.gov)
/////////////////////////////////////////////////////////////////////

#include "CAFAna/Analysis/Prod4Loaders.h"
#include "CAFAna/Core/Loaders.h"
#include "CAFAna/Core/SystShifts.h"
#include "CAFAna/Core/Utilities.h"
#include "CAFAna/Cuts/Cuts.h"
#include "NuXAna/Cuts/NusCuts18.h"
#include "3FlavorAna/Cuts/NumuCuts2018.h"
#include "CAFAna/Cuts/SpillCuts.h"
#include "CAFAna/Decomp/CheatDecomp.h"
#include "CAFAna/Decomp/ProportionalDecomp.h"
#include "CAFAna/Prediction/PredictionGenerator.h"
#include "NuXAna/Prediction/PredictionGeneratorNuX.h"
#include "NuXAna/Prediction/NDPredictionSterile.h"
#include "NuXAna/Prediction/FDPredictionSterile.h"
#include "NuXAna/Prediction/PredictionSterile.h"
#include "CAFAna/Systs/BeamSysts.h"
#include "CAFAna/Systs/Systs.h"
#include "CAFAna/Vars/GenieWeights.h"
#include "CAFAna/Vars/HistAxes.h"
#include "NuXAna/Vars/HistAxes.h"
#include "CAFAna/Vars/PPFXWeights.h"

#include "NuXAna/macros/NuSLoadMacroDefs.h"
#include "NuXAna/macros/Nus18/Nus18Systs/HelperSyst18/NuSSystFunctions18.h"

using namespace ana;

/// Get Beam Transport systematics labels
std::map<std::string, std::vector<std::string> > GetBeamTranspShiftLabels();

/// Run systematics for Beam Transport
void Nus18SystsBeamTranspLoad(TString opt) {

  TH1::AddDirectory(0);
  const Var kReweight = kXSecCVWgt2018*kPPFXFluxCVWgt;

  // Get options
  ECAFType cafType;
  Loaders::FluxType fluxType;
  bool extrap = false;
  if (opt.Contains("caf", TString::kIgnoreCase))
    cafType = ECAFType::kFullCAF;
  else if (opt.Contains("concat", TString::kIgnoreCase))
    cafType = ECAFType::kNusConcat;
  else {
    std::cout << "ECAFType required: caf or concat" << std::endl;
    abort();
  }
  if (opt.Contains("fhc", TString::kIgnoreCase))
    fluxType = Loaders::FluxType::kFHC;
  else if (opt.Contains("rhc", TString::kIgnoreCase))
    fluxType = Loaders::FluxType::kRHC;
  else {
    std::cout << "FluxType required: fhc or rhc" << std::endl;
    abort();
  }
  if (opt.Contains("extrap", TString::kIgnoreCase))
    extrap = true;

  // Set up the loaders
  Loaders* loaders = new Prod4NomLoaders(cafType, fluxType);
  loaders->SetSpillCut(kStandardSpillCuts);

  // Vector of sigmas, levels to set each systematic
  const std::vector<int> sigmas{-3, -2, -1, +1, +2, +3};

  // Get the labels for all Beam Transport systematics
  std::map<std::string, std::vector<std::string> > shiftLabels = GetBeamTranspShiftLabels();

  // Define map of systematic objects, indexed by same labels as previous map
  std::map<std::string, std::map<int, SystShifts*> > systematics;

  // Make SystShifts
  std::string rootfile = FindCAFAnaDir() + "/data/beam/TABeamSyst.root";
  for (const auto& shiftLabel : shiftLabels)
    for(const auto& sigma : sigmas)
      systematics[shiftLabel.first][sigma] =
        new SystShifts(new BeamSyst(rootfile, shiftLabel.second[0], shiftLabel.second[1]), sigma);

  // Define a map of samples and cuts/axes to set them up
  // Each sample, essentially, is a way to set up the analysis
  HistAxis AxisRecoE = kNus18AxisE;
  std::map<std::string, std::pair<HistAxis*, std::pair<Cut*, Cut*> > > cut_samples;
  cut_samples["Nus18"] = std::make_pair(&AxisRecoE, std::make_pair(new Cut(kNus18ND), new Cut(kNus18FD)));

  // Set up maps to the decompositions/predictions (each flavor component)
  // Nominal maps are indexed purely by sample label
  // Shifted maps are indexed by sample label, systematic label, then sigma of the shift
  std::map<std::string, NDPredictionSterile*> predsND_nominal;
  std::map<std::string, FDPredictionSterile*> predsFD_nominal;
  std::map<std::string, PredictionSterile*>   predsExtrap_nominal;
  std::map<std::string, std::map<std::string, std::map<int, NDPredictionSterile*> > > predsND_shifted;
  std::map<std::string, std::map<std::string, std::map<int, FDPredictionSterile*> > > predsFD_shifted;
  std::map<std::string, std::map<std::string, std::map<int, PredictionSterile*> > >   predsExtrap_shifted;

  // Set up the actual decompositions/predictions
  // sample.first = the sample label
  // shiftLabel.first = the systematic shift label
  // sample.second.first = the sample HistAxis
  // sample.second.second = the sample Cut
  // syst.first = the integer number of sigmas for the shift
  // syst.second = the systematic being shifted
  for (const auto& sample : cut_samples) {

    const NDPredictionGenerator gennd(*sample.second.first, *sample.second.second.first, kNoShift, kReweight);
    const FDPredictionGenerator genfd(*sample.second.first, *sample.second.second.second, kNoShift, kReweight);
    SterileGenerator* genExtrap;
    if (extrap)
      genExtrap = new SterileGenerator(*sample.second.first, kNus18BinsNumuCCAxis,
                                       *sample.second.second.second, *sample.second.second.first,    
                                       kNumuCutND2018, kNoShift, kReweight);

    // Set up the nominal decompositions
    // Only one is needed per sample
    predsND_nominal[sample.first] = (NDPredictionSterile*)gennd.Generate(*loaders).release();
    predsFD_nominal[sample.first] = (FDPredictionSterile*)genfd.Generate(*loaders).release();
    if (extrap)
      predsExtrap_nominal[sample.first] = (PredictionSterile*)genExtrap->Generate(*loaders).release();

    // Set up the shifted decompositions
    // One is needed for every sample, systematic, and sigma level
    for(const auto& shiftLabel : shiftLabels) {
      for(const auto& syst : systematics[shiftLabel.first]) {
        predsND_shifted[sample.first][shiftLabel.first][syst.first]
          = (NDPredictionSterile*)gennd.Generate(*loaders, *syst.second).release();
        predsFD_shifted[sample.first][shiftLabel.first][syst.first]
          = (FDPredictionSterile*)genfd.Generate(*loaders, *syst.second).release();
        if (extrap)
          predsExtrap_shifted[sample.first][shiftLabel.first][syst.first]
            = (PredictionSterile*)genExtrap->Generate(*loaders, *syst.second).release();
      }
    }

    if (extrap)
      delete genExtrap;

  }

  loaders->Go();

  std::string folder = "./";
  std::string filenm = "SystsBeam18";

  std::string fullLocation = folder + filenm + ".root";
  TFile* rootF = new TFile(fullLocation.c_str(), "RECREATE");
  SaveMaps(rootF, predsND_nominal, predsND_shifted);
  SaveMaps(rootF, predsFD_nominal, predsFD_shifted);
  if (extrap)
    SaveMaps(rootF, predsExtrap_nominal, predsExtrap_shifted);
  rootF->Close();

  // delete loaders;

  return;

}

std::map<std::string, std::vector<std::string> > GetBeamTranspShiftLabels() {

  // Map to set up systematics
  std::map<std::string, std::vector<std::string> > shiftLabels;

  // First element is a label for the systematic
  shiftLabels["BeamHornCurrent"] = std::vector<std::string>();
  shiftLabels["BeamSpotSize"]    = std::vector<std::string>();
  shiftLabels["BeamposX"]        = std::vector<std::string>();
  shiftLabels["BeamposY"]        = std::vector<std::string>();
  shiftLabels["BeamH1PosX"]      = std::vector<std::string>();
  shiftLabels["BeamH1PosY"]      = std::vector<std::string>();
  shiftLabels["BeamH2PosX"]      = std::vector<std::string>();
  shiftLabels["BeamH2PosY"]      = std::vector<std::string>();
  shiftLabels["TargetPosZ"]      = std::vector<std::string>();
  shiftLabels["BeamExp"]         = std::vector<std::string>();
  shiftLabels["HornWater"]       = std::vector<std::string>();
  shiftLabels["totErr"]          = std::vector<std::string>();

  // Second element is vector for items required to set up Syst object
  shiftLabels["BeamHornCurrent"].push_back("2kA");
  shiftLabels["BeamHornCurrent"].push_back("Horn Current");
  shiftLabels["BeamSpotSize"]   .push_back("0.2mmBeamSpotSize");
  shiftLabels["BeamSpotSize"]   .push_back("Spot Size");
  shiftLabels["BeamposX"]       .push_back("1mmBeamShiftX");
  shiftLabels["BeamposX"]       .push_back("Beam Position X");
  shiftLabels["BeamposY"]       .push_back("1mmBeamShiftY");
  shiftLabels["BeamposY"]       .push_back("Beam Position Y");
  shiftLabels["BeamH1PosX"]     .push_back("3mmHorn1X");
  shiftLabels["BeamH1PosX"]     .push_back("Horn 1 X Position");
  shiftLabels["BeamH1PosY"]     .push_back("3mmHorn1Y");
  shiftLabels["BeamH1PosY"]     .push_back("Horn 1 Y Position");
  shiftLabels["BeamH2PosX"]     .push_back("3mmHorn2X");
  shiftLabels["BeamH2PosX"]     .push_back("Horn 2 X Position");
  shiftLabels["BeamH2PosY"]     .push_back("3mmHorn2Y");
  shiftLabels["BeamH2PosY"]     .push_back("Horn 2 Y Position");
  shiftLabels["TargetPosZ"]     .push_back("7mmTargetZ");
  shiftLabels["TargetPosZ"]     .push_back("Target Z position");
  shiftLabels["BeamExp"]        .push_back("Magnetic Field in Decay Pipe");
  shiftLabels["BeamExp"]        .push_back("Magnet Field in Decay Pipe");
  shiftLabels["HornWater"]      .push_back("1mmHornWater");
  shiftLabels["HornWater"]      .push_back("New Horn Geometry and 1mm water");
  shiftLabels["totErr"]         .push_back("totErr");
  shiftLabels["totErr"]         .push_back("Combined Beam Transport Systematics");

  return shiftLabels;

}