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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief e+e- > pi+pi-pi0
class SND_2020_I1809286 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(SND_2020_I1809286);
/// @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_total, "/TMP/total");
book(_c_omega, "/TMP/omega");
book(_c_rho , "/TMP/rho" );
book(_c_rhop , "/TMP/rhop" );
if(inRange(sqrtS()/GeV,1.42,1.48)) {
book(_h_x,4,1,1);
book(_h_m,4,1,3);
}
else if(inRange(sqrtS()/GeV,1.65,1.68)) {
book(_h_x,4,1,2);
book(_h_m,4,1,4);
}
}
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);
Particle pip,pim;
for (const Particle& p : fs.particles()) {
nCount[p.pid()] += 1;
++ntotal;
if(p.pid() == 211) pip=p;
else if(p.pid()==-211) pim=p;
}
if(ntotal!=3) vetoEvent;
if(nCount[-211]==1&&nCount[211]==1&&nCount[111]==1)
_c_total->fill();
else
vetoEvent;
if(_h_x) {
_h_x->fill(pip.momentum().p()/sqrtS());
_h_x->fill(pim.momentum().p()/sqrtS());
_h_m->fill((pip.momentum()+pim.momentum()).mass()/MeV);
}
const FinalState& ufs = apply<FinalState>(event, "UFS");
for (const Particle& p : ufs.particles(Cuts::abspid==223 or
Cuts::abspid==113 or Cuts::abspid==213 or
Cuts::abspid==100113 or Cuts::abspid==100213)) {
if(p.children().empty()) continue;
map<long,int> nRes = nCount;
int ncount = ntotal;
findChildren(p,nRes,ncount);
if(ncount!=1) continue;
int idOther = 211;
if(p.pid()==223 || p.pid()==113 || p.pid()==100113)
idOther = 111;
else if(p.pid()==213 || p.pid()==100213)
idOther = -211;
bool matched=true;
for(auto const & val : nRes) {
if(val.first==idOther ) {
if(val.second !=1) {
matched = false;
break;
}
}
else if(val.second!=0) {
matched = false;
break;
}
}
if(!matched) continue;
if(matched) {
if(p.pid()==223)
_c_omega->fill();
else if(p.pid()==213 || p.pid()==113)
_c_rho->fill();
else
_c_rhop->fill();
break;
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
if(_h_x) {
normalize(_h_x,1.,false);
normalize(_h_m,1.,false);
}
double fact = crossSection()/nanobarn/sumOfWeights();
for(unsigned int ix=1;ix<4;++ix) {
unsigned int ymax = ix!=3 ? 2 : 4;
for(unsigned int iy=1;iy<ymax;++iy) {
double sigma(0.),error(0.);
if(ix<3) {
sigma = _c_total->val()*fact;
error = _c_total->err()*fact;
}
else if(ix==3) {
if(iy==1) {
sigma = _c_rho->val()*fact;
error = _c_rho->err()*fact;
}
else if(iy==2) {
sigma = _c_rhop->val()*fact;
error = _c_rhop->err()*fact;
}
else {
sigma = _c_omega->val()*fact;
error = _c_omega->err()*fact;
}
}
Scatter2D temphisto(refData(ix, 1, iy));
Scatter2DPtr mult;
book(mult, ix, 1, iy);
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_total,_c_omega,_c_rho,_c_rhop;
Histo1DPtr _h_x,_h_m;
///@}
};
RIVET_DECLARE_PLUGIN(SND_2020_I1809286);
}
|