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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/Beam.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#define I_KNOW_THE_INITIAL_QUARKS_PROJECTION_IS_DODGY_BUT_NEED_TO_USE_IT
#include "Rivet/Projections/InitialQuarks.hh"
namespace Rivet {
/// @brief charged multiplicity at 58 GeV
class VENUS_1998_I453613 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(VENUS_1998_I453613);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
declare(Beam(), "Beams");
declare(ChargedFinalState(), "CFS");
declare(InitialQuarks(), "IQF");
book(_cLight , "/TMP/CLIGHT" );
book(_cBottom, "/TMP/CBOTTOM");
book(_weightLight , "/TMP/WLIGHT" );
book(_weightBottom, "/TMP/WBOTTOM");
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// Even if we only generate hadronic events, we still need a cut on numCharged >= 2.
const FinalState& cfs = apply<FinalState>(event, "CFS");
if (cfs.size() < 2) vetoEvent;
int flavour = 0;
const InitialQuarks& iqf = apply<InitialQuarks>(event, "IQF");
// If we only have two quarks (qqbar), just take the flavour.
// If we have more than two quarks, look for the highest energetic q-qbar pair.
if (iqf.particles().size() == 2) {
flavour = iqf.particles().front().abspid();
}
else {
map<int, double> quarkmap;
for ( const Particle& p : iqf.particles()) {
if (quarkmap[p.pid()] < p.E()) {
quarkmap[p.pid()] = p.E();
}
}
double maxenergy = 0.;
for (int i = 1; i <= 5; ++i) {
if (quarkmap[i]+quarkmap[-i] > maxenergy) {
flavour = i;
}
}
}
const size_t numParticles = cfs.particles().size();
switch (flavour) {
case 1: case 2: case 3:
_weightLight->fill(); ;
_cLight->fill(numParticles);
break;
case 5:
_weightBottom->fill();
_cBottom->fill(numParticles);
break;
}
}
/// Normalise histograms etc., after the run
void finalize() {
// calculate the averages and diffs
if(_weightLight ->effNumEntries()!=0) scale( _cLight, 1./ *_weightLight);
if(_weightBottom->effNumEntries()!=0) scale(_cBottom, 1./ *_weightBottom);
Counter _cDiff = *_cBottom - *_cLight;
// fill the histograms
for(unsigned int ix=1;ix<4;++ix) {
double val(0.), err(0.0);
if(ix==1) {
val = _cBottom->val();
err = _cBottom->err();
}
else if(ix==2) {
val = _cLight->val();
err = _cLight->err();
}
else if(ix==3) {
val = _cDiff.val();
err = _cDiff.err();
}
Scatter2D temphisto(refData(1, 1, ix));
Scatter2DPtr mult;
book(mult,1, 1, ix);
for (size_t b = 0; b < temphisto.numPoints(); b++) {
const double x = temphisto.point(b).x();
pair<double,double> ex = temphisto.point(b).xErrs();
pair<double,double> 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));
}
}
}
}
//@}
/// @name Multiplicities
//@{
CounterPtr _cLight;
CounterPtr _cCharm;
CounterPtr _cBottom;
//@}
/// @name Weights
//@{
CounterPtr _weightLight;
CounterPtr _weightBottom;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(VENUS_1998_I453613);
}
|