JEffectiveMassOffline1D.cc

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#include <string>
#include <iostream>

#include "TROOT.h"
#include "TFile.h"
#include "TH1D.h"

#include "km3net-dataformat/offline/Head.hh"
#include "km3net-dataformat/offline/Evt.hh"

#include "JAAnet/JVolume.hh"
#include "JAAnet/JHeadToolkit.hh"
#include "JAAnet/JAAnetToolkit.hh"

#include "JSupport/JSupport.hh"
#include "JSupport/JEvtWeightFileScannerSet.hh"
#include "JSupport/JMonteCarloFileSupportkit.hh"

#include "JROOT/JManager.hh"

#include "JPhysics/JConstants.hh"

#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"

namespace {

  const char* const Mass_t    =  "Mass";
  const char* const Volume_t  =  "Volume";
}

/**
 * \file
 *
 * Example program to histogram neutrino effective mass for triggered events for offline reconstruction files, using the event weights only.\n
 * The unit of the contents of the histogram is \f$Mton\f$ or \f$km^{3}\f$.
 * \author bjung, mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;
  using namespace KM3NETDAQ;

  JMultipleFileScanner_t    inputFiles;
  string                    outputFile;
  bool                      logx;
  int                       numberOfBins;
  std::string               option;
  int                       debug;

  
  try {

    JParser<> zap("Example program to histogram neutrino effective mass for triggered events.");

    zap['f'] = make_field(inputFiles);
    zap['o'] = make_field(outputFile)      = "Meff.root";
    zap['X'] = make_field(logx,         "Use logarithm of energy");
    zap['N'] = make_field(numberOfBins, "Number of bins in the energy range of the MC simulation")  = 10;
    zap['O'] = make_field(option,       "Result option")                                            = Mass_t, Volume_t;
    zap['d'] = make_field(debug)           = 2;
    
    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }

  try {

    double Xmin = numeric_limits<double>::max();
    double Xmax = numeric_limits<double>::lowest();

    JEvtWeightFileScannerSet<> scanners(inputFiles);

    for (JEvtWeightFileScannerSet<>::const_iterator scanner = scanners.cbegin(); scanner != scanners.cend(); ++scanner) {

      const JVolume volume(scanner->getHeader(), logx);

      if (volume.getXmin() < Xmin) { Xmin = volume.getXmin(); }
      if (volume.getXmax() > Xmax) { Xmax = volume.getXmax(); }
    }

    JManager<int, TH1D> hm(new TH1D("hm[%]", option.c_str(), numberOfBins, Xmin, Xmax));

    for (JEvtWeightFileScannerSet<>::iterator scanner = scanners.begin(); scanner != scanners.end(); ++scanner) {

      const JHead header = scanner->getHeader();

      NOTICE("Scanning file type " << scanner->getName() << endl);
      DEBUG (header << endl);

      const JEvtWeight& weighter = scanner->getEvtWeighter();

      if (!header.is_valid(&JHead::genvol)) {
        FATAL("Mising normalisation in header." << endl);
      }

      double Wnorm = header.genvol.numberOfEvents;

      if (header.is_valid(&JHead::cut_nu))
        Wnorm *= 2*PI * (header.cut_nu.cosT.getUpperLimit() - header.cut_nu.cosT.getLowerLimit());
      else
        Wnorm *= 4*PI;

      while (scanner->hasNext()) {

        STATUS("event: " << setw(10) << scanner->getCounter() << '\r'); DEBUG(endl);

        const Evt* event   = scanner->next();
        const Trk& primary = get_primary(*event);

        double x = logx ? log10(primary.E) : primary.E;
        double y = 0.0;
        double w = (getVolume(weighter, *event)                                               /  
                    (logx ? log(10.0) * primary.E * hm->GetBinWidth(1) : hm->GetBinWidth(1))  /
                    Wnorm);

        if        (option == Mass_t) {
          y = w * DENSITY_SEA_WATER * 1e-6;       // Mton
        } else if (option == Volume_t) {
          y = w * 1e-9;                           // km^3
        }

        hm[primary.type]->Fill(x, y);
      }
      STATUS(endl);
    }
  
    TFile out(outputFile.c_str(), "recreate");

    out << hm;
  
    out.Close();
  }
  catch(const JException& error) {
    FATAL(error << endl);
  }
}