Rivet analyses

// -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/Beam.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/Hemispheres.hh"
#include "Rivet/Projections/ParisiTensor.hh"
#include "Rivet/Projections/Sphericity.hh"
#include "Rivet/Projections/Thrust.hh"

namespace Rivet {


  /// @brief event shapes at 133, 161 172 and 183 GeV
  class DELPHI_1999_I499183 : public Analysis {
  public:

    /// Constructor
    RIVET_DEFAULT_ANALYSIS_CTOR(DELPHI_1999_I499183);


    /// @name Analysis methods
    /// @{

    /// Book histograms and initialise projections before the run
    void init() {

      // Initialise and register projections
      declare(Beam(), "Beams");
      const FinalState fs;
      declare(fs, "FS");
      const Thrust thrust(fs);
      declare(thrust, "Thrust");
      declare(Sphericity(fs), "Sphericity");
      declare(ParisiTensor(fs), "Parisi");
      declare(Hemispheres(thrust), "Hemispheres");

      // Book histograms
      size_t ie = 0;
      for (double eVal : allowedEnergies()) {

        const string en = toString(round(eVal));
        if (isCompatibleWithSqrtS(eVal)) _sqs = en;

        size_t offset, offset2;
        if (ie == 3) {
          offset = 1;
          offset2 = 1;
        }
        else if (ie == 2) {
          offset = 0;
          offset2 = 3;
        }
        else if (ie == 1) {
          offset = 0;
          offset2 = 2;
        }
        else {
          offset = 0;
          offset2 = 1;
        }

        book(_h[en + "thrust"], 13 + offset, 1, offset2);
        book(_h[en + "major"], 15 + offset, 1, offset2);
        book(_h[en + "minor"], 17 + offset, 1, offset2);
        book(_h[en + "oblateness"], 19 + offset, 1, offset2);
        book(_h[en + "sphericity"], 21 + offset, 1, offset2);
        book(_h[en + "planarity"], 23 + offset, 1, offset2);
        book(_h[en + "aplanarity"], 25 + offset, 1, offset2);
        book(_h[en + "heavy_jet_mass"], 27 + offset, 1, offset2);
        book(_h[en + "light_jet_mass"], 29 + offset, 1, offset2);
        book(_h[en + "diff_jet_mass"], 31 + offset, 1, offset2);
        book(_h[en + "wide_broading"], 33 + offset, 1, offset2);
        book(_h[en + "narrow_broading"], 35 + offset, 1, offset2);
        book(_h[en + "total_broading"], 37 + offset, 1, offset2);
        book(_h[en + "diff_broading"], 39 + offset, 1, offset2);
        book(_h[en + "CParam"], 41 + offset, 1, offset2);
        book(_h[en + "DParam"], 43 + offset, 1, offset2);

        if (ie < 3) {
          book(_p["thrust"][ie], 1, 1, 1 + ie);
          book(_p["major"][ie], 2, 1, 1 + ie);
          book(_p["minor"][ie], 3, 1, 1 + ie);
          book(_p["obl"][ie], 4, 1, 1 + ie);
          book(_p["heavy"][ie], 5, 1, 1 + ie);
          book(_p["light"][ie], 6, 1, 1 + ie);
          book(_p["diff"][ie], 7, 1, 1 + ie);
          book(_p["bmax"][ie], 8, 1, 1 + ie);
          book(_p["bmin"][ie], 9, 1, 1 + ie);
          book(_p["bsum"][ie], 10, 1, 1 + ie);
          book(_p["bdiff"][ie], 11, 1, 1 + ie);
          book(_p["C"][ie], 12, 1, 1 + ie);
        }
        ++ie;
      }
      raiseBeamErrorIf(_sqs.empty());
    }

    void fillMoment(array<BinnedProfilePtr<int>, 3>& mom, double val) {
      double tmp = val;
      for (size_t ix = 0; ix < 3; ++ix) {
        mom[ix]->fill(std::stoi(_sqs), tmp);
        tmp *= val;
      }
    }

    /// Perform the per-event analysis
    void analyze(const Event& event) {

      // Get beams and average beam momentum
      const ParticlePair& beams = apply<Beam>(event, "Beams").beams();
      const double meanBeamMom = 0.5 * (beams.first.p3().mod() + beams.second.p3().mod());
      MSG_DEBUG("Avg beam momentum = " << meanBeamMom);

      const Thrust& thrust = apply<Thrust>(event, "Thrust");
      // thrust related observables
      _h[_sqs + "thrust"]->fill(1. - thrust.thrust());
      _h[_sqs + "major"]->fill(thrust.thrustMajor());
      _h[_sqs + "minor"]->fill(thrust.thrustMinor());
      _h[_sqs + "oblateness"]->fill(thrust.oblateness());
      fillMoment(_p["thrust"], 1. - thrust.thrust());
      fillMoment(_p["major"], thrust.thrustMajor());
      fillMoment(_p["minor"], thrust.thrustMinor());
      fillMoment(_p["obl"], thrust.oblateness());
      // sphericity related
      const Sphericity& sphericity = apply<Sphericity>(event, "Sphericity");
      _h[_sqs + "sphericity"]->fill(sphericity.sphericity());
      _h[_sqs + "planarity"]->fill(sphericity.planarity());
      _h[_sqs + "aplanarity"]->fill(sphericity.aplanarity());
      // hemisphere related
      const Hemispheres& hemi = apply<Hemispheres>(event, "Hemispheres");
      // standard jet masses
      _h[_sqs + "heavy_jet_mass"]->fill(hemi.scaledM2high());
      _h[_sqs + "light_jet_mass"]->fill(hemi.scaledM2low());
      _h[_sqs + "diff_jet_mass"]->fill(hemi.scaledM2diff());
      fillMoment(_p["heavy"], hemi.scaledM2high());
      fillMoment(_p["light"], hemi.scaledM2low());
      fillMoment(_p["diff"], hemi.scaledM2diff());
      // jet broadening
      _h[_sqs + "wide_broading"]->fill(hemi.Bmax());
      _h[_sqs + "narrow_broading"]->fill(hemi.Bmin());
      _h[_sqs + "total_broading"]->fill(hemi.Bsum());
      _h[_sqs + "diff_broading"]->fill(hemi.Bdiff());
      fillMoment(_p["bmax"], hemi.Bmax());
      fillMoment(_p["bmin"], hemi.Bmin());
      fillMoment(_p["bsum"], hemi.Bsum());
      fillMoment(_p["bdiff"], hemi.Bdiff());
      MSG_DEBUG("Calculating Parisi params");
      const ParisiTensor& parisi = apply<ParisiTensor>(event, "Parisi");
      _h[_sqs + "CParam"]->fill(parisi.C());
      _h[_sqs + "DParam"]->fill(parisi.D());
      fillMoment(_p["C"], parisi.C());
    }


    /// Normalise histograms etc., after the run
    void finalize() {
      for (double eVal : allowedEnergies()) {

        const string en = toString(round(eVal));

        for (auto& item : _h) {
          if (item.first.substr(0, 3) != en) continue;
          normalize(item.second);
        }
      }
    }

    /// @}


    /// @name Histograms
    /// @{
    map<string, Histo1DPtr> _h;

    map<string, array<BinnedProfilePtr<int>, 3>> _p;

    string _sqs = "";
    /// @}
  };


  RIVET_DECLARE_PLUGIN(DELPHI_1999_I499183);


}