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## Rivet analyses reference

### MC_REENTRANT

Experiment: ()
Status: UNVALIDATED
No authors listed No references listed
Beams: * *
Beam energies: ANY
No run details listed

Source code: MC_REENTRANT.cc
  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/FinalState.hh" #include "Rivet/Projections/ChargedFinalState.hh" namespace Rivet { /// Generic analysis looking att pp pseudorepidity distributions at /// two collision energies. It usess the possibility to read in a /// pre-exixsting yoda file, and if histograms for both energies are /// filled when finalize() is called, a ratio plot is produced. class MC_REENTRANT : public Analysis { public: /// Constructor DEFAULT_RIVET_ANALYSIS_CTOR(MC_REENTRANT); /// @name Analysis methods //@{ /// Book histograms and initialise projections before the run void init() { // Projections const FinalState fs(Cuts::abseta < 5 && Cuts::pT > 500*MeV); declare(fs, "FS"); declare(ChargedFinalState(fs), "CFS"); // Histograms. Booked for both 900 GeV and 7 TeV and their ratio. book(_histEta70, "Eta70", 50, -5, 5); book(_histEta09, "Eta09", 50, -5, 5); book(_histEtaR , "EtaR", 50, -5, 5); fill70 = fill09 = false; } /// Perform the per-event analysis void analyze(const Event& event) { if (fuzzyEquals(sqrtS()/GeV, 900)) fill09 = true; else if (fuzzyEquals(sqrtS()/GeV, 7000)) fill70 = true; const FinalState& cfs = apply(event, "CFS"); for (const Particle& p : cfs.particles()) { if (fuzzyEquals(sqrtS()/GeV, 900)) _histEta09->fill(p.eta()); else if (fuzzyEquals(sqrtS()/GeV, 7000)) _histEta70->fill(p.eta()); } } /// Finalize void finalize() { if ( fill70 ) scale(_histEta70, 1.0/sumOfWeights()); if ( fill09 ) scale(_histEta09, 1.0/sumOfWeights()); if ( _histEta70->numEntries() > 0 && _histEta09->numEntries() > 0 ) divide(_histEta70, _histEta09, _histEtaR); } //@} private: /// @name Histograms //@{ Histo1DPtr _histEta09, _histEta70; Scatter2DPtr _histEtaR; //@} bool fill09, fill70; }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(MC_REENTRANT); }