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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
#include "Rivet/Projections/Thrust.hh"
#include "Rivet/Projections/Sphericity.hh"
#include "Rivet/Projections/ParisiTensor.hh"
#include "Rivet/Projections/Hemispheres.hh"
#include "Rivet/Projections/Beam.hh"
namespace Rivet {
/// ALEPH jet rates and event shapes at LEP 1 and 2
class ALEPH_2004_S5765862 : public Analysis {
public:
RIVET_DEFAULT_ANALYSIS_CTOR(ALEPH_2004_S5765862);
void init() {
_initialisedJets = true;
_initialisedSpectra = true;
// TODO: According to the paper they seem to discard neutral particles
// between 1 and 2 GeV. That correction is included in the systematic
// uncertainties and overly complicated to program, so we ignore it.
const FinalState fs;
declare(fs, "FS");
FastJets durhamjets(fs, FastJets::DURHAM, 0.7, JetAlg::Muons::ALL, JetAlg::Invisibles::ALL);
declare(durhamjets, "DurhamJets");
const Thrust thrust(fs);
declare(thrust, "Thrust");
declare(Sphericity(fs), "Sphericity");
declare(ParisiTensor(fs), "Parisi");
declare(Hemispheres(thrust), "Hemispheres");
const ChargedFinalState cfs;
declare(Beam(), "Beams");
declare(cfs, "CFS");
// Histos
// offset for the event shapes and jets
int offset = 0;
switch (int(sqrtS()/GeV + 0.5)) {
case 91: offset = 0; break;
case 133: offset = 1; break;
case 161: offset = 2; break;
case 172: offset = 3; break;
case 183: offset = 4; break;
case 189: offset = 5; break;
case 200: offset = 6; break;
case 206: offset = 7; break;
default:
_initialisedJets = false;
}
// event shapes
if(_initialisedJets) {
book(_h_thrust ,offset+54, 1, 1);
book(_h_heavyjetmass ,offset+62, 1, 1);
book(_h_totaljetbroadening ,offset+70, 1, 1);
book(_h_widejetbroadening ,offset+78, 1, 1);
book(_h_cparameter ,offset+86, 1, 1);
book(_h_thrustmajor ,offset+94, 1, 1);
book(_h_thrustminor ,offset+102, 1, 1);
book(_h_jetmassdifference ,offset+110, 1, 1);
book(_h_aplanarity ,offset+118, 1, 1);
if ( offset != 0 )
book(_h_planarity, offset+125, 1, 1);
book(_h_oblateness ,offset+133, 1, 1);
book(_h_sphericity ,offset+141, 1, 1);
// Durham n->m jet resolutions
book(_h_y_Durham[0] ,offset+149, 1, 1); // y12 d149 ... d156
book(_h_y_Durham[1] ,offset+157, 1, 1); // y23 d157 ... d164
if (offset < 6) { // there is no y34, y45 and y56 for 200 gev
book(_h_y_Durham[2] ,offset+165, 1, 1); // y34 d165 ... d172, but not 171
book(_h_y_Durham[3] ,offset+173, 1, 1); // y45 d173 ... d179
book(_h_y_Durham[4] ,offset+180, 1, 1); // y56 d180 ... d186
}
else if (offset == 6) {
_h_y_Durham[2] = Histo1DPtr();
_h_y_Durham[3] = Histo1DPtr();
_h_y_Durham[4] = Histo1DPtr();
}
else if (offset == 7) {
book(_h_y_Durham[2] ,172, 1, 1);
book(_h_y_Durham[3] ,179, 1, 1);
book(_h_y_Durham[4] ,186, 1, 1);
}
// Durham n-jet fractions
book(_h_R_Durham[0] ,offset+187, 1, 1); // R1 d187 ... d194
book(_h_R_Durham[1] ,offset+195, 1, 1); // R2 d195 ... d202
book(_h_R_Durham[2] ,offset+203, 1, 1); // R3 d203 ... d210
book(_h_R_Durham[3] ,offset+211, 1, 1); // R4 d211 ... d218
book(_h_R_Durham[4] ,offset+219, 1, 1); // R5 d219 ... d226
book(_h_R_Durham[5] ,offset+227, 1, 1); // R>=6 d227 ... d234
}
// offset for the charged particle distributions
offset = 0;
switch (int(sqrtS() + 0.5)) {
case 133: offset = 0; break;
case 161: offset = 1; break;
case 172: offset = 2; break;
case 183: offset = 3; break;
case 189: offset = 4; break;
case 196: offset = 5; break;
case 200: offset = 6; break;
case 206: offset = 7; break;
default:
_initialisedSpectra = false;
}
if (_initialisedSpectra) {
book(_h_xp , 2+offset, 1, 1);
book(_h_xi ,11+offset, 1, 1);
book(_h_xe ,19+offset, 1, 1);
book(_h_pTin ,27+offset, 1, 1);
if (offset == 7)
book(_h_pTout, 35, 1, 1);
book(_h_rapidityT ,36+offset, 1, 1);
book(_h_rapidityS ,44+offset, 1, 1);
}
book(_weightedTotalChargedPartNum, "_weightedTotalChargedPartNum");
if (!_initialisedSpectra && !_initialisedJets) {
MSG_WARNING("CoM energy of events sqrt(s) = " << sqrtS()/GeV
<< " doesn't match any available analysis energy .");
}
book(mult, 1, 1, 1);
}
void analyze(const Event& e) {
const Thrust& thrust = apply<Thrust>(e, "Thrust");
const Sphericity& sphericity = apply<Sphericity>(e, "Sphericity");
if(_initialisedJets) {
bool LEP1 = isCompatibleWithSqrtS(91.2*GeV,0.01);
// event shapes
double thr = LEP1 ? thrust.thrust() : 1.0 - thrust.thrust();
_h_thrust->fill(thr);
_h_thrustmajor->fill(thrust.thrustMajor());
if(LEP1)
_h_thrustminor->fill(log(thrust.thrustMinor()));
else
_h_thrustminor->fill(thrust.thrustMinor());
_h_oblateness->fill(thrust.oblateness());
const Hemispheres& hemi = apply<Hemispheres>(e, "Hemispheres");
_h_heavyjetmass->fill(hemi.scaledM2high());
_h_jetmassdifference->fill(hemi.scaledM2diff());
_h_totaljetbroadening->fill(hemi.Bsum());
_h_widejetbroadening->fill(hemi.Bmax());
const ParisiTensor& parisi = apply<ParisiTensor>(e, "Parisi");
_h_cparameter->fill(parisi.C());
_h_aplanarity->fill(sphericity.aplanarity());
if(_h_planarity)
_h_planarity->fill(sphericity.planarity());
_h_sphericity->fill(sphericity.sphericity());
// Jet rates
const FastJets& durjet = apply<FastJets>(e, "DurhamJets");
double log10e = log10(exp(1.));
if (durjet.clusterSeq()) {
double logynm1=0.;
double logyn;
for (size_t i=0; i<5; ++i) {
double yn = durjet.clusterSeq()->exclusive_ymerge_max(i+1);
if (yn<=0.0) continue;
logyn = -log(yn);
if (_h_y_Durham[i]) {
_h_y_Durham[i]->fill(logyn);
}
if(!LEP1) logyn *= log10e;
for (size_t j = 0; j < _h_R_Durham[i]->numBins(); ++j) {
double val = _h_R_Durham[i]->bin(j).xMin();
double width = _h_R_Durham[i]->bin(j).xWidth();
if(-val<=logynm1) break;
if(-val<logyn) {
_h_R_Durham[i]->fill(val+0.5*width, width);
}
}
logynm1 = logyn;
}
for (size_t j = 0; j < _h_R_Durham[5]->numBins(); ++j) {
double val = _h_R_Durham[5]->bin(j).xMin();
double width = _h_R_Durham[5]->bin(j).xWidth();
if(-val<=logynm1) break;
_h_R_Durham[5]->fill(val+0.5*width, width);
}
}
if( !_initialisedSpectra) {
const ChargedFinalState& cfs = apply<ChargedFinalState>(e, "CFS");
const size_t numParticles = cfs.particles().size();
_weightedTotalChargedPartNum->fill(numParticles);
}
}
// charged particle distributions
if(_initialisedSpectra) {
const ChargedFinalState& cfs = apply<ChargedFinalState>(e, "CFS");
const size_t numParticles = cfs.particles().size();
_weightedTotalChargedPartNum->fill(numParticles);
const ParticlePair& beams = apply<Beam>(e, "Beams").beams();
const double meanBeamMom = ( beams.first.p3().mod() +
beams.second.p3().mod() ) / 2.0;
for (const Particle& p : cfs.particles()) {
const double xp = p.p3().mod()/meanBeamMom;
_h_xp->fill(xp );
const double logxp = -std::log(xp);
_h_xi->fill(logxp);
const double xe = p.E()/meanBeamMom;
_h_xe->fill(xe );
const double pTinT = dot(p.p3(), thrust.thrustMajorAxis());
const double pToutT = dot(p.p3(), thrust.thrustMinorAxis());
_h_pTin->fill(fabs(pTinT/GeV));
if(_h_pTout) _h_pTout->fill(fabs(pToutT/GeV));
const double momT = dot(thrust.thrustAxis() ,p.p3());
const double rapidityT = 0.5 * std::log((p.E() + momT) /
(p.E() - momT));
_h_rapidityT->fill(fabs(rapidityT));
const double momS = dot(sphericity.sphericityAxis(),p.p3());
const double rapidityS = 0.5 * std::log((p.E() + momS) /
(p.E() - momS));
_h_rapidityS->fill(fabs(rapidityS));
}
}
}
void finalize() {
if(!_initialisedJets && !_initialisedSpectra) return;
if (_initialisedJets) {
normalize(_h_thrust);
normalize(_h_heavyjetmass);
normalize(_h_totaljetbroadening);
normalize(_h_widejetbroadening);
normalize(_h_cparameter);
normalize(_h_thrustmajor);
normalize(_h_thrustminor);
normalize(_h_jetmassdifference);
normalize(_h_aplanarity);
if(_h_planarity) normalize(_h_planarity);
normalize(_h_oblateness);
normalize(_h_sphericity);
for (size_t n=0; n<6; ++n) {
scale(_h_R_Durham[n], 1./sumOfWeights());
}
for (size_t n = 0; n < 5; ++n) {
if (_h_y_Durham[n]) {
scale(_h_y_Durham[n], 1.0/sumOfWeights());
}
}
}
Histo1D temphisto(refData(1, 1, 1));
const double avgNumParts = dbl(*_weightedTotalChargedPartNum) / sumOfWeights();
for (size_t b = 0; b < temphisto.numBins(); b++) {
const double x = temphisto.bin(b).xMid();
const double ex = temphisto.bin(b).xWidth()/2.;
if (inRange(sqrtS()/GeV, x-ex, x+ex)) {
mult->addPoint(x, avgNumParts, ex, 0.);
}
}
if (_initialisedSpectra) {
normalize(_h_xp, avgNumParts);
normalize(_h_xi, avgNumParts);
normalize(_h_xe, avgNumParts);
normalize(_h_pTin , avgNumParts);
if (_h_pTout) normalize(_h_pTout, avgNumParts);
normalize(_h_rapidityT, avgNumParts);
normalize(_h_rapidityS, avgNumParts);
}
}
private:
bool _initialisedJets = false;
bool _initialisedSpectra = false;
Scatter2DPtr mult;
Histo1DPtr _h_xp;
Histo1DPtr _h_xi;
Histo1DPtr _h_xe;
Histo1DPtr _h_pTin;
Histo1DPtr _h_pTout;
Histo1DPtr _h_rapidityT;
Histo1DPtr _h_rapidityS;
Histo1DPtr _h_thrust;
Histo1DPtr _h_heavyjetmass;
Histo1DPtr _h_totaljetbroadening;
Histo1DPtr _h_widejetbroadening;
Histo1DPtr _h_cparameter;
Histo1DPtr _h_thrustmajor;
Histo1DPtr _h_thrustminor;
Histo1DPtr _h_jetmassdifference;
Histo1DPtr _h_aplanarity;
Histo1DPtr _h_planarity;
Histo1DPtr _h_oblateness;
Histo1DPtr _h_sphericity;
Histo1DPtr _h_R_Durham[6];
Histo1DPtr _h_y_Durham[5];
CounterPtr _weightedTotalChargedPartNum;
};
RIVET_DECLARE_ALIASED_PLUGIN(ALEPH_2004_S5765862, ALEPH_2004_I636645);
}
|