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Rivet analyses reference
PLUTO_1983_I191161
Measurement of average transverse momentum w.r.t thurst and Sphericity Axes for $E_{\text{CMS}}=7.7\to31.6$ GeV
Experiment: PLUTO (DORIS/Petra)
Inspire ID: 191161
Status: VALIDATED
Authors:
No references listed
Beams: e- e+
Beam energies: (3.9, 3.9); (4.7, 4.7); (6.0, 6.0); (6.5, 6.5); (8.5, 8.5); (11.0, 11.0); (13.8, 13.8); (15.4, 15.4) GeV
Run details:
- $e^+e^-\to$ hadrons. Beam energy must be specified as analysis option "ENERGY" when rivet-merging samples.
Measurements of the average transverse momentum w.r.t thurst and Sphericity Axes for $E_{\text{CMS}}=7.7\to31.6$ GeV. Beam energy must be specified as analysis option "ENERGY" when rivet-merging samples.
Source code:
PLUTO_1983_I191161.cc
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178 | // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/Beam.hh"
#include "Rivet/Projections/Thrust.hh"
#include "Rivet/Projections/Sphericity.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
namespace Rivet {
/// @brief average pT w.r.t. thrust and sphericity axes
class PLUTO_1983_I191161 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(PLUTO_1983_I191161);
/// @name Analysis methods
/// @{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
const FinalState fs;
declare(fs, "FS");
declare(ChargedFinalState(), "CFS");
// Thrust
const Thrust thrust(fs);
declare(thrust, "Thrust");
const Sphericity sphericity(fs);
declare(sphericity, "Sphericity");
sqs = 1.0;
if (isCompatibleWithSqrtS(7.7)) sqs = 7.7;
else if (isCompatibleWithSqrtS(9.4)) sqs = 9.4;
else if (isCompatibleWithSqrtS(12.)) sqs = 12.;
else if (isCompatibleWithSqrtS(13.)) sqs = 13.;
else if (isCompatibleWithSqrtS(17.)) sqs = 17.;
else if (isCompatibleWithSqrtS(22.)) sqs = 22.;
else if (isCompatibleWithSqrtS(27.6)) sqs = 27.6;
else if (isCompatibleWithSqrtS(30.8)) sqs = 30.8;
else MSG_ERROR("Beam energy " << sqrtS() << " not supported!");
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// at least 4 charged particles
if (apply<ChargedFinalState>(event, "CFS").particles().size()<4) vetoEvent;
// Sphericities
MSG_DEBUG("Calculating sphericity");
const Sphericity& sphericity = apply<Sphericity>(event, "Sphericity");
MSG_DEBUG("Calculating thrust");
const Thrust& thrust = apply<Thrust>(event, "Thrust");
const FinalState & fs = apply<FinalState>(event, "FS");
// remove pi0->gammagamma decay products and replace with the pi0s
// needed to get the average pTs right
Particles fsParticles;
set<ConstGenParticlePtr> pi0;
for(const Particle & p : fs.particles()) {
if ((p.pid()!=PID::PHOTON && p.abspid()!=PID::ELECTRON)|| p.parents().empty() || p.parents()[0].pid()!=PID::PI0)
fsParticles.push_back(p);
else {
if (pi0.find(p.parents()[0].genParticle())==pi0.end())
fsParticles.push_back(p.parents()[0]);
}
}
double pT_T_sum(0.),pT2_T_sum(0.);
double pT_S_sum(0.),pT2_S_sum(0.);
for(const Particle & p : fsParticles) {
const Vector3 mom3 = p.p3();
const double pTinT = dot(mom3, thrust.thrustMajorAxis());
const double pToutT = dot(mom3, thrust.thrustMinorAxis());
const double pTinS = dot(mom3, sphericity.sphericityMajorAxis());
const double pToutS = dot(mom3, sphericity.sphericityMinorAxis());
const double pT2_T = sqr(pTinT) + sqr(pToutT);
const double pT2_S = sqr(pTinS) + sqr(pToutS);
const double pT_T = sqrt(pT2_T);
const double pT_S = sqrt(pT2_S);
pT_T_sum += sqrt(pT2_T);
pT2_T_sum += pT2_T ;
pT_S_sum += sqrt(pT2_S);
pT2_S_sum += pT2_S ;
_p_thrust_pt .fill(pT_T /MeV );
_p_thrust_pt2 .fill(pT2_T/1e3/sqr(MeV));
_p_sphere_pt .fill(pT_S /MeV );
_p_sphere_pt2 .fill(pT2_S/1e3/sqr(MeV));
}
_p_thrust_sum_pt .fill(pT_T_sum /GeV );
_p_thrust_sum_pt2 .fill(pT2_T_sum/GeV );
_p_sphere_sum_pt .fill(pT_S_sum /GeV );
_p_sphere_sum_pt2 .fill(pT2_S_sum/GeV );
}
/// Normalise histograms etc., after the run
void finalize() {
for(unsigned int ix=1;ix<3;++ix) {
for(unsigned int iy=1;iy<5;++iy) {
double value = 0.0, error = 0.0;
if (ix==1) {
if (iy==1) {
value = _p_thrust_pt.xMean();
error = _p_thrust_pt.xStdErr();
}
else if (iy==2) {
value = _p_thrust_pt2.xMean();
error = _p_thrust_pt2.xStdErr();
}
else if (iy==3) {
value = _p_thrust_sum_pt.xMean();
error = _p_thrust_sum_pt.xStdErr();
}
else if (iy==4) {
value = _p_thrust_sum_pt2.xMean();
error = _p_thrust_sum_pt2.xStdErr();
}
}
else {
if (iy==1) {
value = _p_sphere_pt.xMean();
error = _p_sphere_pt.xStdErr();
}
else if (iy==2) {
value = _p_sphere_pt2.xMean();
error = _p_sphere_pt2.xStdErr();
}
else if (iy==3) {
value = _p_sphere_sum_pt.xMean();
error = _p_sphere_sum_pt.xStdErr();
}
else if (iy==4) {
value = _p_sphere_sum_pt2.xMean();
error = _p_sphere_sum_pt2.xStdErr();
}
}
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(sqs, x-ex2.first, x+ex2.second)) {
mult->addPoint(x, value, ex, make_pair(error,error));
}
else {
mult->addPoint(x, 0., ex, make_pair(0.,.0));
}
}
}
}
}
/// @}
/// @name Histograms
//@{
YODA::Dbn1D _p_thrust_pt, _p_thrust_pt2, _p_thrust_sum_pt, _p_thrust_sum_pt2;
YODA::Dbn1D _p_sphere_pt, _p_sphere_pt2, _p_sphere_sum_pt, _p_sphere_sum_pt2;
double sqs;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(PLUTO_1983_I191161);
}
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