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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief Add a short analysis description here
class CMD2_1995_I406880 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(CMD2_1995_I406880);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(FinalState(), "FS");
declare(UnstableParticles(), "UFS");
book(_nKpKm, "TMP/KpKm");
book(_nK0K0, "TMP/K0K0");
book(_n3pi, "TMP/3pi");
book(_numEtaGamma, "TMP/EtaGamma");
}
void findChildren(const Particle & p,map<long,int> & nRes, int &ncount) {
for (const Particle &child : p.children()) {
if(child.children().empty()) {
--nRes[child.pid()];
--ncount;
}
else
findChildren(child,nRes,ncount);
}
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const FinalState& fs = apply<FinalState>(event, "FS");
map<long,int> nCount;
int ntotal(0);
for (const Particle& p : fs.particles()) {
nCount[p.pid()] += 1;
++ntotal;
}
if(ntotal==2) {
if(nCount[321]==1 && nCount[-321]==1)
_nKpKm->fill();
else if(nCount[130]==1 && nCount[310]==1)
_nK0K0->fill();
}
else if(ntotal==3 && nCount[211] == 1 && nCount[-211] == 1 && nCount[111] == 1)
_n3pi->fill();
const FinalState& ufs = apply<FinalState>(event, "UFS");
for (const Particle& p : ufs.particles()) {
if(p.children().empty()) continue;
// find the omega
if(p.pid()==221) {
map<long,int> nRes = nCount;
int ncount = ntotal;
findChildren(p,nRes,ncount);
// eta pi+pi-
if(ncount!=1) continue;
bool matched = true;
for(auto const & val : nRes) {
if(val.first==22) {
if(val.second !=1) {
matched = false;
break;
}
}
else if(val.second!=0) {
matched = false;
break;
}
}
if(matched)
_numEtaGamma->fill();
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
for(unsigned int ix=1;ix<5;++ix) {
double sigma = 0., error = 0.;
if(ix==1) {
sigma = _nKpKm->val();
error = _nKpKm->err();
}
else if(ix==2) {
sigma = _nK0K0->val();
error = _nK0K0->err();
}
else if(ix==3) {
sigma = _n3pi->val();
error = _n3pi->err();
}
else if(ix==4) {
sigma = _numEtaGamma->val();
error = _numEtaGamma->err();
}
sigma *= crossSection()/ sumOfWeights() /nanobarn;
error *= crossSection()/ sumOfWeights() /nanobarn;
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()/MeV, x-ex2.first, x+ex2.second)) {
mult->addPoint(x, sigma, ex, make_pair(error,error));
}
else {
mult->addPoint(x, 0., ex, make_pair(0.,.0));
}
}
}
}
//@}
/// @name Histograms
//@{
CounterPtr _nKpKm,_nK0K0,_n3pi,_numEtaGamma;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(CMD2_1995_I406880);
}
|