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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/Beam.hh"
#include "Rivet/Projections/Sphericity.hh"
#include "Rivet/Projections/UnstableParticles.hh"
#include "Rivet/Projections/ChargedFinalState.hh"
namespace Rivet {
/// @brief baryons at 34.8 and 42.1 GeV
class TASSO_1989_I266893 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(TASSO_1989_I266893);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(Beam(), "Beams");
declare(UnstableParticles(), "UFS");
const ChargedFinalState cfs;
declare(cfs, "CFS");
declare(Sphericity(cfs), "Sphericity");
// Book histograms
_ih=-1;
sqs = 1.0;
if(isCompatibleWithSqrtS(34.8)) {
_ih=0;
sqs = 34.8;
}
else if (isCompatibleWithSqrtS(42.1)) {
_ih=1;
sqs = 42.1;
}
else
MSG_ERROR("Beam energy " << sqrtS() << " not supported!");
book(_h_lam_p ,6*_ih+3,1,1);
book(_h_lam_pL ,6*_ih+4,1,1);
book(_h_lam_pTIn ,6*_ih+5,1,1);
book(_h_lam_pTOut,6*_ih+6,1,1);
book(_h_lam_rap ,6*_ih+7,1,1);
book(_h_lam_x ,6*_ih+8,1,1);
book(_p_lam_S_1 ,15+_ih,1,1);
book(_p_lam_S_2 ,15+_ih,1,2);
if(_ih==0) {
book(_h_xi_p ,18,1,1);
book(_h_xi_pL ,19,1,1);
book(_h_xi_pTIn ,20,1,1);
book(_h_xi_pTOut,21,1,1);
book(_h_xi_rap ,22,1,1);
book(_h_xi_x ,23,1,1);
}
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const ChargedFinalState& cfs = apply<ChargedFinalState>(event, "CFS");
const size_t numParticles = cfs.particles().size();
// Even if we only generate hadronic events, we still need a cut on numCharged >= 2.
if (numParticles < 2) {
MSG_DEBUG("Failed leptonic event cut");
vetoEvent;
}
MSG_DEBUG("Passed leptonic event cut");
// Get beams and average beam momentum
const ParticlePair& beams = apply<Beam>(event, "Beams").beams();
const double meanBeamMom = ( beams.first.p3().mod() +
beams.second.p3().mod() ) / 2.0;
const Sphericity& sphericity = apply<Sphericity>(event, "Sphericity");
unsigned int nLam(0);
UnstableParticles ufs = apply<UnstableParticles>(event,"UFS");
for(const Particle & p : ufs.particles(Cuts::abspid==3122 or Cuts::abspid==3312)) {
int id = abs(p.pid());
double xE = p.E()/meanBeamMom;
Vector3 mom3 = p.p3();
const double energy = p.E();
double modp = mom3.mod();
double beta = modp/energy;
const double momS = dot(sphericity.sphericityAxis(), mom3);
const double pTinS = dot(mom3, sphericity.sphericityMajorAxis());
const double pToutS = dot(mom3, sphericity.sphericityMinorAxis());
const double rapidityS = 0.5 * std::log((energy + momS) / (energy - momS));
if(id==3122) {
_h_lam_x->fill(xE,1./beta);
_h_lam_p->fill(modp/GeV);
_h_lam_pL ->fill(abs(momS)/GeV );
_h_lam_pTIn ->fill(abs(pTinS)/GeV );
_h_lam_pTOut->fill(abs(pToutS)/GeV);
_h_lam_rap ->fill(abs(rapidityS) );
++nLam;
}
else if(_h_xi_x) {
_h_xi_x->fill(xE,1./beta);
_h_xi_p->fill(modp/GeV);
_h_xi_pL ->fill(abs(momS)/GeV );
_h_xi_pTIn ->fill(abs(pTinS)/GeV );
_h_xi_pTOut->fill(abs(pToutS)/GeV);
_h_xi_rap ->fill(abs(rapidityS) );
}
}
double sphere = sphericity.sphericity();
_p_lam_S_1->fill(sphere,nLam);
_p_lam_S_2->fill(sphere,cfs.particles().size());
}
/// Normalise histograms etc., after the run
void finalize() {
scale( _h_lam_p , crossSection()/nanobarn/sumOfWeights());
scale( _h_lam_pL , crossSection()/nanobarn/sumOfWeights());
scale( _h_lam_pTIn , crossSection()/nanobarn/sumOfWeights());
scale( _h_lam_pTOut, crossSection()/nanobarn/sumOfWeights());
scale( _h_lam_rap , crossSection()/nanobarn/sumOfWeights());
scale( _h_lam_x , sqr(sqs)*crossSection()/nanobarn/sumOfWeights());
Scatter2DPtr temp;
book(temp,15+_ih,1,3);
divide(_p_lam_S_1,_p_lam_S_2,temp);
if(_ih==0) {
scale( _h_xi_p , crossSection()/nanobarn/sumOfWeights());
scale( _h_xi_pL , crossSection()/nanobarn/sumOfWeights());
scale( _h_xi_pTIn , crossSection()/nanobarn/sumOfWeights());
scale( _h_xi_pTOut, crossSection()/nanobarn/sumOfWeights());
scale( _h_xi_rap , crossSection()/nanobarn/sumOfWeights());
scale( _h_xi_x , sqr(sqs)*crossSection()/nanobarn/sumOfWeights());
}
}
//@}
/// @name Histograms
//@{
Histo1DPtr _h_lam_p, _h_lam_pL, _h_lam_pTIn, _h_lam_pTOut, _h_lam_rap, _h_lam_x;
Profile1DPtr _p_lam_S_1, _p_lam_S_2;
Histo1DPtr _h_xi_p, _h_xi_pL, _h_xi_pTIn, _h_xi_pTOut, _h_xi_rap, _h_xi_x;
int _ih;
double sqs;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(TASSO_1989_I266893);
}
|