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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/Beam.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include <cmath>
#define I_KNOW_THE_INITIAL_QUARKS_PROJECTION_IS_DODGY_BUT_NEED_TO_USE_IT
#include "Rivet/Projections/InitialQuarks.hh"
namespace Rivet {
/// @brief OPAL multiplicities at various energies
///
/// @author Peter Richardson
class OPAL_2002_S5361494 : public Analysis {
public:
RIVET_DEFAULT_ANALYSIS_CTOR(OPAL_2002_S5361494);
/// @name Analysis methods
/// @{
void init() {
// Projections
declare(Beam(), "Beams");
declare(ChargedFinalState(), "CFS");
declare(InitialQuarks(), "IQF");
// Histograms
book(_cLight, "TMP/CLIGHT" );
book(_wLight, "TMP/WLIGHT" );
book(_cCharm, "TMP/CCHARM" );
book(_wCharm, "TMP/WCHARM" );
book(_cBottom, "TMP/CBOTTOM");
book(_wBottom, "TMP/WBOTTOM");
}
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:
_wLight ->fill();
_cLight ->fill(numParticles);
break;
case 4:
_wCharm ->fill();
_cCharm ->fill(numParticles);
break;
case 5:
_wBottom->fill();
_cBottom->fill(numParticles);
break;
}
}
void finalize() {
// calculate the averages and diffs
if(_wLight ->numEntries()) scale( _cLight, 1./_wLight->val());
if(_wCharm ->numEntries()) scale( _cCharm, 1./_wCharm->val());
if(_wBottom->numEntries()) scale(_cBottom,1./_wBottom->val());
Counter _cDiff = *_cBottom - *_cLight;
// fill the histograms
for (unsigned int ix=1;ix<5;++ix) {
double val(0.), err(0.0);
if(ix==1) {
val = _cBottom->val();
err = _cBottom->err();
}
else if(ix==2) {
val = _cCharm->val();
err = _cCharm->err();
}
else if(ix==3) {
val = _cLight->val();
err = _cLight->err();
}
else if(ix==4) {
val = _cDiff.val();
err = _cDiff.err();
}
/// @todo TIDY!
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));
}
}
}
}
/// @}
private:
/// @name Multiplicities
/// @todo Don't we have a Dbn1D-like type that can do both at once?
/// @{
CounterPtr _cLight, _wLight;
CounterPtr _cCharm, _wCharm;
CounterPtr _cBottom, _wBottom;
/// @}
};
RIVET_DECLARE_ALIASED_PLUGIN(OPAL_2002_S5361494, OPAL_2002_I601225);
}
|