1// -*- C++ -*-
  2#include "Rivet/Analysis.hh"
  3#include "Rivet/Projections/Beam.hh"
  4#include "Rivet/Projections/FinalState.hh"
  5#include "Rivet/Projections/ChargedFinalState.hh"
  6#include "Rivet/Projections/Sphericity.hh"
  7#include "Rivet/Projections/Thrust.hh"
  8#include "Rivet/Projections/FastJets.hh"
  9#include "Rivet/Projections/ParisiTensor.hh"
 10#include "Rivet/Projections/Hemispheres.hh"
 11
 12namespace Rivet {
 13
 14
 15  /// @brief event shapes at 161
 16  class OPAL_1997_I440721 : public Analysis {
 17  public:
 18
 19    /// Constructor
 20    RIVET_DEFAULT_ANALYSIS_CTOR(OPAL_1997_I440721);
 21
 22
 23    /// @name Analysis methods
 24    /// @{
 25
 26    /// Book histograms and initialise projections before the run
 27    void init() {
 28
 29      // Initialise and register projections
 30      // Projections
 31      declare(Beam(), "Beams");
 32      const FinalState fs;
 33      declare(fs, "FS");
 34      const ChargedFinalState cfs;
 35      declare(cfs, "CFS");
 36      declare(FastJets(fs, JetAlg::DURHAM, 0.7), "DurhamJets");
 37      declare(Sphericity(fs), "Sphericity");
 38      declare(ParisiTensor(fs), "Parisi");
 39      const Thrust thrust(fs);
 40      declare(thrust, "Thrust");
 41      declare(Hemispheres(thrust), "Hemispheres");
 42
 43      // Book histograms
 44      book(_h_mult_avrg,   2,1,1);
 45      book(_h_thrust    ,  3,1,1);
 46      book(_h_major     ,  4,1,1);
 47      book(_h_minor     ,  5,1,1);
 48      book(_h_aplanarity,  8,1,1);
 49      book(_h_oblateness,  6,1,1);
 50      book(_h_C         ,  9,1,1);
 51      book(_h_rhoH      , 10,1,1);
 52      book(_h_sphericity,  7,1,1);
 53      book(_h_totalB    , 11,1,1);
 54      book(_h_wideB     , 12,1,1);
 55      book(_h_y23       , 20,1,1);
 56      book(_h_pTin      , 21,1,1);
 57      book(_h_pTout     , 22,1,1);
 58      book(_h_y         , 23,1,1);
 59      book(_h_x         , 24,1,1);
 60      book(_h_xi        , 25,1,1);
 61      book(_h_mult      , 26,1,1);
 62      book(_sumW,"/TMP/sumW");
 63    }
 64
 65
 66    /// Perform the per-event analysis
 67    void analyze(const Event& event) {
 68      // Even if we only generate hadronic events, we still need a cut on numCharged >= 2.
 69      const FinalState& cfs = apply<FinalState>(event, "CFS");
 70      if (cfs.size() < 2) vetoEvent;
 71      _sumW->fill();
 72
 73      // Get beams and average beam momentum
 74      const ParticlePair& beams = apply<Beam>(event, "Beams").beams();
 75      const double meanBeamMom = ( beams.first.p3().mod() +
 76                                   beams.second.p3().mod() ) / 2.0;
 77
 78      // Thrust related
 79      const Thrust& thrust = apply<Thrust>(event, "Thrust");
 80      _h_thrust    ->fill(thrust.thrust()     );
 81      _h_major     ->fill(thrust.thrustMajor());
 82      _h_minor     ->fill(thrust.thrustMinor());
 83      _h_oblateness->fill(thrust.oblateness());
 84
 85      // Sphericity related
 86      const Sphericity& sphericity = apply<Sphericity>(event, "Sphericity");
 87      _h_sphericity->fill(sphericity.sphericity());
 88      _h_aplanarity->fill(sphericity.aplanarity());
 89
 90      // C parameter
 91      const ParisiTensor& parisi = apply<ParisiTensor>(event, "Parisi");
 92      _h_C->fill(parisi.C());
 93
 94      // Hemispheres
 95      const Hemispheres& hemi = apply<Hemispheres>(event, "Hemispheres");
 96
 97      _h_rhoH  ->fill(hemi.scaledMhigh());
 98      _h_wideB ->fill(hemi.Bmax());
 99      _h_totalB->fill(hemi.Bsum());
100
101      // Jets
102      const FastJets& durjet = apply<FastJets>(event, "DurhamJets");
103      const double y23 = durjet.clusterSeq()->exclusive_ymerge_max(2);
104      _h_y23->fill(y23);
105
106      // charged particles
107      _h_mult->fill(cfs.particles().size());
108      _h_mult_avrg->fill(161, cfs.particles().size());
109      for (const Particle& p : cfs.particles()) {
110        const Vector3 mom3  = p.p3();
111        const double energy = p.E();
112        const double pTinT  = dot(mom3, thrust.thrustMajorAxis());
113        const double pToutT = dot(mom3, thrust.thrustMinorAxis());
114      	_h_pTin ->fill(fabs(pTinT/GeV) );
115      	_h_pTout->fill(fabs(pToutT/GeV));
116        const double momT = dot(thrust.thrustAxis(), mom3);
117        const double rapidityT = 0.5 * std::log((energy + momT) / (energy - momT));
118      	_h_y->fill(fabs(rapidityT));
119        const double mom = mom3.mod();
120        const double scaledMom = mom/meanBeamMom;
121        const double logInvScaledMom = -std::log(scaledMom);
122        _h_xi->fill(logInvScaledMom);
123        _h_x ->fill(scaledMom      );
124      }
125    }
126
127
128    /// Normalise histograms etc., after the run
129    void finalize() {
130      scale(_h_thrust    ,1./ *_sumW);
131      scale(_h_major     ,1./ *_sumW);
132      scale(_h_minor     ,1./ *_sumW);
133      scale(_h_aplanarity,1./ *_sumW);
134      scale(_h_oblateness,1./ *_sumW);
135      scale(_h_C         ,1./ *_sumW);
136      scale(_h_rhoH      ,1./ *_sumW);
137      scale(_h_sphericity,1./ *_sumW);
138      scale(_h_totalB    ,1./ *_sumW);
139      scale(_h_wideB     ,1./ *_sumW);
140      scale(_h_y23       ,1./ *_sumW);
141      scale(_h_mult      ,200./ *_sumW);
142      scale(_h_pTin      ,1./ *_sumW);
143      scale(_h_pTout     ,1./ *_sumW);
144      scale(_h_y         ,1./ *_sumW);
145      scale(_h_x         ,1./ *_sumW);
146      scale(_h_xi        ,1./ *_sumW);
147    }
148
149    /// @}
150
151
152    /// @name Histograms
153    /// @{
154    Histo1DPtr _h_thrust,_h_major,_h_minor,_h_aplanarity,_h_oblateness,_h_C,_h_rhoH,_h_sphericity;
155    Histo1DPtr _h_totalB,_h_wideB,_h_y23,_h_pTin,_h_pTout,_h_y,_h_x,_h_xi;
156    BinnedHistoPtr<int> _h_mult;
157    BinnedProfilePtr<int> _h_mult_avrg;
158    CounterPtr _sumW;
159    /// @}
160
161
162  };
163
164
165  RIVET_DECLARE_PLUGIN(OPAL_1997_I440721);
166
167
168}