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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
class CLEO_1991_I29927 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(CLEO_1991_I29927);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(UnstableParticles(), "UFS");
// Book histograms
book(_c_B, "/TMP/sigma_B");
book(_c_Bstar, "/TMP/sigma_Bstar");
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const FinalState& ufs = apply<FinalState>(event, "UFS");
unsigned int nBstar(0);
// Get Bottom hadrons
const Particles bhads = filter_select(ufs.particles(), isBottomHadron);
// find the Bstars
for (const Particle& p : bhads) {
if(abs(p.pid())==513 || abs(p.pid())==523) {
if(!p.hasDescendantWith(Cuts::pid == p.pid())) ++nBstar;
}
}
if(!bhads.empty())
_c_B->fill();
if(nBstar!=0)
_c_Bstar->fill(nBstar);
}
/// Normalise histograms etc., after the run
void finalize() {
double fact = crossSection()/ sumOfWeights() /picobarn;
for(unsigned int ix=1;ix<3;++ix) {
double sig(0.),err(0.);
if(ix==1) {
sig = _c_B->val()*fact;
err = _c_B->err()*fact;
}
else {
sig = _c_Bstar->val()*fact;
err = _c_Bstar->err()*fact;
}
Scatter2D temphisto(refData(ix, 1, 1));
Scatter2DPtr mult;
book(mult, ix, 1, 1);
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, sig, ex, make_pair(err,err));
}
else {
mult->addPoint(x, 0., ex, make_pair(0.,.0));
}
}
}
}
//@}
/// @name Histograms
//@{
CounterPtr _c_B, _c_Bstar;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(CLEO_1991_I29927);
}
|