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## Rivet analyses reference

### JADE_1983_I190818

Hadronic charged multiplicity measurement between 12 and 35 GeV
Experiment: JADE (PETRA)
Inspire ID: 190818
Status: VALIDATED
Authors:
• Peter Richardson
References:
• Z.Phys. C20 (1983) 187
Beams: e+ e-
Beam energies: (6.0, 6.0); (15.0, 15.0); (17.5, 17.5) GeV
Run details:
• Hadronic e+ e- events generated below the Z pole

The charged particle multiplicity distribution of hadronic $e^+e^-$ events as measured between 12 and 35 GeV using the JADE detector at PETRA.

Source code: JADE_1983_I190818.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 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/ChargedFinalState.hh" namespace Rivet { /// @brief Average multiplcity at a range of energies class JADE_1983_I190818 : public Analysis { public: /// Constructor DEFAULT_RIVET_ANALYSIS_CTOR(JADE_1983_I190818); /// @name Analysis methods //@{ /// Book histograms and initialise projections before the run void init() { const ChargedFinalState cfs; declare(cfs, "CFS"); if( !(fuzzyEquals(sqrtS()/GeV,12.0) || fuzzyEquals(sqrtS()/GeV,30.0) || fuzzyEquals(sqrtS()/GeV,35.0) )) { MSG_WARNING("CoM energy of events sqrt(s) = " << sqrtS()/GeV << " doesn't match any available analysis energy ."); } book(_counter, "/TMP/MULT"); book(_mult, 1, 1, 1); } /// Perform the per-event analysis void analyze(const Event& event) { const FinalState& cfs = apply(event, "CFS"); MSG_DEBUG("Total charged multiplicity = " << cfs.size()); _counter->fill(sqrtS(), cfs.size()); } /// Normalise histograms etc., after the run void finalize() { scale(_counter,1./sumOfWeights()); double val = _counter->val(); double err = _counter->err(); Scatter2D tempScat(refData(1, 1, 1)); for (size_t b = 0; b < tempScat.numPoints(); b++) { const double x = tempScat.point(b).x(); pair ex = tempScat.point(b).xErrs(); pair ex2 = ex; if(ex2.first ==0.) ex2. first=0.0001; if(ex2.second==0.) ex2.second=0.0001; if (inRange(sqrtS()/GeV, x-ex2.first, x+ex2.second)) { _mult->addPoint(x, val, ex, make_pair(err,err)); } else { _mult->addPoint(x, 0., ex, make_pair(0.,.0)); } } } //@} private: // Histogram CounterPtr _counter; Scatter2DPtr _mult; }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(JADE_1983_I190818); }