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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief SND pi+pi-pi0eta cross section
class SND_2019_I1726419 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(SND_2019_I1726419);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(FinalState(), "FS");
declare(UnstableParticles(), "UFS");
book(_c_all , "/TMP/all");
book(_c_omega, "/TMP/omega");
book(_c_phi , "/TMP/phi");
book(_c_rho , "/TMP/rho");
}
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;
}
const FinalState& ufs = apply<FinalState>(event, "UFS");
bool found = false, foundOmegaPhi = false;
for (const Particle& p : ufs.particles(Cuts::pid==221)) {
map<long,int> nRes = nCount;
int ncount = ntotal;
findChildren(p,nRes,ncount);
// eta pi+pi-
if(ncount==3) {
bool matched = true;
for(auto const & val : nRes) {
if(abs(val.first)==211 || val.first==111 ) {
if(val.second !=1) {
matched = false;
break;
}
}
else if(val.second!=0) {
matched = false;
break;
}
}
if(matched) {
_c_all->fill();
found = true;
}
}
for (const Particle& p2 : ufs.particles()) {
if(p2.pid()!=223 && p2.pid()!=333) continue;
map<long,int> nResB = nRes;
int ncountB = ncount;
findChildren(p2,nResB,ncountB);
if(ncountB!=0) continue;
bool matched2 = true;
for(auto const & val : nResB) {
if(val.second!=0) {
matched2 = false;
break;
}
}
if(matched2) {
if(p2.pid()==223)
_c_omega->fill();
else if(p2.pid()==333)
_c_phi->fill();
foundOmegaPhi=true;
}
}
}
if(found && !foundOmegaPhi)
_c_rho->fill();
}
/// Normalise histograms etc., after the run
void finalize() {
double fact = crossSection()/nanobarn/sumOfWeights();
for(unsigned int ix=1;ix<5;++ix) {
double sigma(0.),error(0.);
if(ix==1) {
sigma = _c_all->val()*fact;
error = _c_all->err()*fact;
}
else if(ix==2) {
sigma = _c_omega->val()*fact;
error = _c_omega->err()*fact;
}
else if(ix==3) {
sigma = _c_phi->val()*fact;
error = _c_phi->err()*fact;
}
else if(ix==4) {
sigma = _c_rho->val()*fact;
error = _c_rho->err()*fact;
}
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, sigma, ex, make_pair(error,error));
}
else {
mult->addPoint(x, 0., ex, make_pair(0.,.0));
}
}
}
}
//@}
/// @name Histograms
//@{
CounterPtr _c_all, _c_omega, _c_phi,_c_rho;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(SND_2019_I1726419);
}
|