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| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief pi+- K+- K0S pbar spectra continuum and Upsilon 1s
class ARGUS_1989_I276860 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(ARGUS_1989_I276860);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(FinalState(), "FS");
declare(UnstableParticles(), "UFS");
// Book histograms
book(_h_pi_ups1_p, 5, 1, 1);
book(_h_pi_cont_p, 5, 1, 2);
book(_h_pi_ups1_z, 9, 1, 1);
book(_h_pi_cont_z, 9, 1, 2);
book(_h_Kp_ups1_p, 6, 1, 1);
book(_h_Kp_cont_p, 6, 1, 2);
book(_h_Kp_ups1_z, 10, 1, 1);
book(_h_Kp_cont_z, 10, 1, 2);
book(_h_KS_ups1_p, 7, 1, 1);
book(_h_KS_cont_p, 7, 1, 2);
book(_h_KS_ups1_z, 11, 1, 1);
book(_h_KS_cont_z, 11, 1, 2);
book(_h_pt_ups1_p, 8, 1, 1);
book(_h_pt_cont_p, 8, 1, 2);
book(_h_pt_ups1_z, 12, 1, 1);
book(_h_pt_cont_z, 12, 1, 2);
// Counters
book(_n_PiA[1],"/TMP/PiACont");
book(_n_PiA[0],"/TMP/PiAUps1");
book(_n_PiB[1],"/TMP/PiBCont");
book(_n_PiB[0],"/TMP/PiBUps1");
book(_n_Kp[1] ,"/TMP/KpCont");
book(_n_Kp[0] ,"/TMP/KpUps1");
book(_n_KS[1] ,"/TMP/KSCont");
book(_n_KS[0] ,"/TMP/KSUps1");
book(_n_ptA[1],"/TMP/ptACont");
book(_n_ptA[0],"/TMP/ptAUps1");
book(_n_ptB[1],"/TMP/ptBCont");
book(_n_ptB[0],"/TMP/ptBUps1");
// weights
book(_weightSum_cont,"/TMP/weightSum_cont");
book(_weightSum_Ups1,"/TMP/weightSum_Ups1");
}
/// Recursively walk the decay tree to find decay products of @a p
void findDecayProducts(Particle mother, Particles& unstable) {
for(const Particle & p: mother.children()) {
const int id = abs(p.pid());
if(id == 211 || id == 2212 || id == 310|| id==130 || id == 321) {
unstable.push_back(p);
}
if(!p.children().empty())
findDecayProducts(p, unstable);
}
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// Find the Upsilons among the unstables
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
const FinalState & fs = apply<FinalState>(event, "FS");
Particles upsilons = ufs.particles(Cuts::pid==553);
// Continuum
if (upsilons.empty()) {
MSG_DEBUG("No Upsilons found => continuum event");
_weightSum_cont->fill();
// stable particles
for (const Particle& p : fs.particles(Cuts::abspid==211 or Cuts::abspid==2212 or Cuts::abspid==321 )) {
const int id = abs(p.pid());
const double xE = 2.*p.E()/sqrtS();
const double modp = p.p3().mod();
const double beta = modp / p.E();
int idMom = !p.parents().empty() ? abs(p.parents()[0].pid()) : 0;
if(id==211) {
// not from K0S or Lambda decays
if(idMom!=310 && idMom != 3122) {
_h_pi_cont_p->fill(modp);
_h_pi_cont_z->fill(xE ,1./beta);
_n_PiA[1]->fill();
}
_n_PiB[1]->fill();
}
else if(id==321) {
_h_Kp_cont_p->fill(modp);
_h_Kp_cont_z->fill(xE ,1./beta);
_n_Kp[1]->fill();
}
else if(id==2212) {
// not from K0S or Lambda decays
if(idMom!=310 && idMom != 3122) {
_h_pt_cont_p->fill(modp);
_h_pt_cont_z->fill(xE ,1./beta);
_n_ptA[1]->fill();
}
_n_ptB[1]->fill();
}
}
// Unstable particles
for (const Particle& p : ufs.particles(Cuts::pid==310 || Cuts::pid==130)) {
const double xE = 2.*p.E()/sqrtS();
const double modp = p.p3().mod();
const double beta = modp / p.E();
_h_KS_cont_p->fill(modp);
_h_KS_cont_z->fill(xE ,1./beta);
_n_KS[1]->fill();
}
}
// Upsilon(s) found
else {
MSG_DEBUG("Upsilons found => resonance event");
for (const Particle& ups : upsilons) {
_weightSum_Ups1->fill();
Particles unstable;
// Find the decay products we want
findDecayProducts(ups, unstable);
LorentzTransform cms_boost;
if (ups.p3().mod() > 1*MeV)
cms_boost = LorentzTransform::mkFrameTransformFromBeta(ups.momentum().betaVec());
const double mass = ups.mass();
// loop over decay products
for(const Particle& p : unstable) {
const int id = abs(p.pid());
const FourMomentum p2 = cms_boost.transform(p.momentum());
const double xE = 2.*p2.E()/mass;
const double modp = p2.p3().mod();
const double beta = modp / p2.E();
int idMom = !p.parents().empty() ? abs(p.parents()[0].pid()) : 0;
if(id==211) {
// not from K0S or Lambda decays
if(idMom!=310 && idMom != 3122) {
_h_pi_ups1_p->fill(modp);
_h_pi_ups1_z->fill(xE ,1./beta);
_n_PiA[0]->fill();
}
_n_PiB[0]->fill();
}
else if(id==321) {
_h_Kp_ups1_p->fill(modp);
_h_Kp_ups1_z->fill(xE ,1./beta);
_n_Kp[0]->fill();
}
else if(id==2212) {
// not from K0S or Lambda decays
if(idMom!=310 && idMom != 3122) {
_h_pt_ups1_p->fill(modp);
_h_pt_ups1_z->fill(xE ,1./beta);
_n_ptA[0]->fill();
}
_n_ptB[0]->fill();
}
else if(id==310 || id==130) {
_h_KS_ups1_p->fill(modp);
_h_KS_ups1_z->fill(xE ,1./beta);
_n_KS[0]->fill();
}
}
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
// Scale histos
if (_weightSum_cont->val() > 0.) {
scale(_h_pi_cont_p, 1./ *_weightSum_cont);
scale(_h_Kp_cont_p, 1./ *_weightSum_cont);
scale(_h_KS_cont_p, 1./ *_weightSum_cont);
scale(_h_pt_cont_p, 1./ *_weightSum_cont);
scale(_h_pi_cont_z, 1./ *_weightSum_cont);
scale(_h_Kp_cont_z, 1./ *_weightSum_cont);
scale(_h_KS_cont_z, 1./ *_weightSum_cont);
scale(_h_pt_cont_z, 1./ *_weightSum_cont);
}
if (_weightSum_Ups1->val() > 0.) {
scale(_h_pi_ups1_p, 1./ *_weightSum_Ups1);
scale(_h_Kp_ups1_p, 1./ *_weightSum_Ups1);
scale(_h_KS_ups1_p, 1./ *_weightSum_Ups1);
scale(_h_pt_ups1_p, 1./ *_weightSum_Ups1);
scale(_h_pi_ups1_z, 1./ *_weightSum_Ups1);
scale(_h_Kp_ups1_z, 1./ *_weightSum_Ups1);
scale(_h_KS_ups1_z, 1./ *_weightSum_Ups1);
scale(_h_pt_ups1_z, 1./ *_weightSum_Ups1);
}
// Counters
Scatter2DPtr nPiA;
book(nPiA, 1, 1, 1, true);
Scatter2DPtr nPiB;
book(nPiB, 1, 1, 2, true);
Scatter2DPtr nKS ;
book(nKS, 2, 1, 1, true);
Scatter2DPtr nKp ;
book(nKp,3, 1, 1, true);
Scatter2DPtr nptA;
book(nptA,4, 1, 1, true);
Scatter2DPtr nptB;
book(nptB,4, 1, 2, true);
vector<CounterPtr> scales = {_weightSum_Ups1,_weightSum_cont};
for(unsigned int ix=0;ix<2;++ix) {
scale(_n_PiA[ix],1./ *scales[ix]);
nPiA->point(ix).setY(_n_PiA[ix]->val(),_n_PiA[ix]->err());
scale(_n_PiB[ix],1./ *scales[ix]);
nPiB->point(ix).setY(_n_PiB[ix]->val(),_n_PiB[ix]->err());
scale(_n_Kp[ix] ,1./ *scales[ix]);
nKp->point(ix).setY(_n_Kp[ix]->val(),_n_Kp[ix]->err());
scale(_n_KS[ix] ,1./ *scales[ix]);
nKS->point(ix).setY(_n_KS[ix]->val(),_n_KS[ix]->err());
scale(_n_ptA[ix],1./ *scales[ix]);
nptA->point(ix).setY(_n_ptA[ix]->val(),_n_ptA[ix]->err());
scale(_n_ptB[ix],1./ *scales[ix]);
nptB->point(ix).setY(_n_ptB[ix]->val(),_n_ptB[ix]->err());
}
}
//@}
/// @name Histograms
//@{
Histo1DPtr _h_pi_ups1_p, _h_pi_cont_p, _h_pi_ups1_z, _h_pi_cont_z;
Histo1DPtr _h_Kp_ups1_p, _h_Kp_cont_p, _h_Kp_ups1_z, _h_Kp_cont_z;
Histo1DPtr _h_KS_ups1_p, _h_KS_cont_p, _h_KS_ups1_z, _h_KS_cont_z;
Histo1DPtr _h_pt_ups1_p, _h_pt_cont_p, _h_pt_ups1_z, _h_pt_cont_z;
// Counters
CounterPtr _n_PiA[2], _n_PiB[2], _n_Kp[2], _n_KS[2], _n_ptA[2],_n_ptB[2];
CounterPtr _weightSum_cont,_weightSum_Ups1;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(ARGUS_1989_I276860);
}
|