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QAG4SimulationUpsilon.cc
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1 #include "QAG4SimulationUpsilon.h"
2 
3 #include "QAHistManagerDef.h"
4 
5 #include <g4eval/SvtxEvalStack.h>
6 
7 #include <g4main/PHG4Particle.h>
8 #include <g4main/PHG4TruthInfoContainer.h>
9 
10 #include <trackbase_historic/SvtxTrack.h>
11 
12 #include <g4eval/SvtxTrackEval.h> // for SvtxTrackEval
13 #include <g4eval/SvtxTruthEval.h> // for SvtxTruthEval
14 
15 #include <fun4all/Fun4AllHistoManager.h>
16 #include <fun4all/Fun4AllReturnCodes.h>
17 #include <fun4all/SubsysReco.h>
18 
19 #include <phool/getClass.h>
20 
21 #include <TAxis.h>
22 #include <TDatabasePDG.h>
23 #include <TH1.h>
24 #include <TH2.h>
25 #include <TNamed.h>
26 #include <TParticlePDG.h> // for TParticlePDG
27 #include <TString.h>
28 #include <TVector3.h>
29 
30 #include <CLHEP/Vector/LorentzVector.h>
31 #include <CLHEP/Vector/ThreeVector.h> // for Hep3Vector
32 
33 #include <cassert>
34 #include <cmath>
35 #include <cstdlib> // for abs
36 #include <iostream>
37 #include <utility> // for pair
38 
39 QAG4SimulationUpsilon::QAG4SimulationUpsilon(const std::string &name)
40  : SubsysReco(name)
41  , _svtxEvalStack(nullptr)
42  , m_etaRange(-1, 1)
43  , _truthContainer(nullptr)
44 {
45 }
46 
47 int QAG4SimulationUpsilon::InitRun(PHCompositeNode *topNode)
48 {
49  _truthContainer = findNode::getClass<PHG4TruthInfoContainer>(topNode,
50  "G4TruthInfo");
51  if (!_truthContainer)
52  {
53  std::cout << "QAG4SimulationUpsilon::InitRun - Fatal Error - "
54  << "unable to find DST node "
55  << "G4TruthInfo" << std::endl;
56  assert(_truthContainer);
57  }
58 
59  if (!_svtxEvalStack)
60  {
61  _svtxEvalStack.reset(new SvtxEvalStack(topNode));
62  _svtxEvalStack->set_strict(true);
63  _svtxEvalStack->set_verbosity(Verbosity() + 1);
64  }
65 
66  return Fun4AllReturnCodes::EVENT_OK;
67 }
68 
69 int QAG4SimulationUpsilon::Init(PHCompositeNode * /*topNode*/)
70 {
71  Fun4AllHistoManager *hm = QAHistManagerDef::getHistoManager();
72  assert(hm);
73 
74  // reco pT / gen pT histogram
75  TH1 *h(nullptr);
76 
77  h = new TH1F(TString(get_histo_prefix()) + "pTRecoGenRatio",
78  ";Reco p_{T}/Truth p_{T}", 500, 0, 2);
79  hm->registerHisto(h);
80 
81  h = new TH2F(TString(get_histo_prefix()) + "pTRecoGenRatio_pTGen",
82  ";Truth p_{T} [GeV/c];Reco p_{T}/Truth p_{T}", 200, 0, 50, 500, 0, 2);
83  // QAHistManagerDef::useLogBins(h->GetXaxis());
84  hm->registerHisto(h);
85 
86  // reco pT histogram
87  h = new TH1F(TString(get_histo_prefix()) + "nReco_pTGen",
88  "Reco tracks at truth p_{T};Truth p_{T} [GeV/c]", 200, 0.1, 50.5);
89  QAHistManagerDef::useLogBins(h->GetXaxis());
90  hm->registerHisto(h);
91  // reco pT histogram
92  h = new TH1F(TString(get_histo_prefix()) + "nGen_pTGen",
93  ";Truth p_{T} [GeV/c];Track count / bin", 200, 0.1, 50.5);
94  QAHistManagerDef::useLogBins(h->GetXaxis());
95  hm->registerHisto(h);
96 
97  // reco pT histogram
98  h = new TH1F(TString(get_histo_prefix()) + "nReco_etaGen",
99  "Reco tracks at truth #eta;Truth #eta", 200, -2, 2);
100  // QAHistManagerDef::useLogBins(h->GetXaxis());
101  hm->registerHisto(h);
102  // reco pT histogram
103  h = new TH1F(TString(get_histo_prefix()) + "nGen_etaGen",
104  ";Truth #eta;Track count / bin", 200, -2, 2);
105  // QAHistManagerDef::useLogBins(h->GetXaxis());
106  hm->registerHisto(h);
107 
108  h = new TH1F(TString(get_histo_prefix()) + "nGen_Pair_InvMassGen",
109  ";Truth Invariant Mass [GeV/c^2];Pair count / bin", 450, 0, 15);
110  // QAHistManagerDef::useLogBins(h->GetXaxis());
111  hm->registerHisto(h);
112  h = new TH1F(TString(get_histo_prefix()) + "nReco_Pair_InvMassReco",
113  ";Reco Invariant Mass [GeV/c^2];Pair count / bin", 450, 0, 15);
114  // QAHistManagerDef::useLogBins(h->GetXaxis());
115  hm->registerHisto(h);
116 
117  // n events and n tracks histogram
118  h = new TH1F(TString(get_histo_prefix()) + "Normalization",
119  TString(get_histo_prefix()) + " Normalization;Items;Count", 10, .5, 10.5);
120  int i = 1;
121  h->GetXaxis()->SetBinLabel(i++, "Event");
122  h->GetXaxis()->SetBinLabel(i++, "Truth Track+");
123  h->GetXaxis()->SetBinLabel(i++, "Truth Track-");
124  h->GetXaxis()->SetBinLabel(i++, "Reco Track");
125  h->GetXaxis()->SetBinLabel(i++, "Truth Upsilon");
126  h->GetXaxis()->SetBinLabel(i++, "Truth Upsilon in Acc.");
127  h->GetXaxis()->SetBinLabel(i++, "Reco Upsilon");
128  h->GetXaxis()->LabelsOption("v");
129  hm->registerHisto(h);
130 
131  return Fun4AllReturnCodes::EVENT_OK;
132 }
133 
134 void QAG4SimulationUpsilon::addEmbeddingID(int embeddingID)
135 {
136  m_embeddingIDs.insert(embeddingID);
137 }
138 
139 int QAG4SimulationUpsilon::process_event(PHCompositeNode *topNode)
140 {
141  if (Verbosity() > 2)
142  std::cout << "QAG4SimulationUpsilon::process_event() entered" << std::endl;
143 
144  // histogram manager
145  Fun4AllHistoManager *hm = QAHistManagerDef::getHistoManager();
146  assert(hm);
147 
148  if (_svtxEvalStack)
149  _svtxEvalStack->next_event(topNode);
150 
151  SvtxTrackEval *trackeval = _svtxEvalStack->get_track_eval();
152  assert(trackeval);
153  SvtxTruthEval *trutheval = _svtxEvalStack->get_truth_eval();
154  assert(trutheval);
155 
156  // reco pT / gen pT histogram
157  TH1 *h_pTRecoGenRatio = dynamic_cast<TH1 *>(hm->getHisto(get_histo_prefix() + "pTRecoGenRatio"));
158  assert(h_pTRecoGenRatio);
159 
160  // reco pT / gen pT histogram
161  TH2 *h_pTRecoGenRatio_pTGen = dynamic_cast<TH2 *>(hm->getHisto(get_histo_prefix() + "pTRecoGenRatio_pTGen"));
162  assert(h_pTRecoGenRatio);
163 
164  // reco histogram plotted at gen pT
165  TH1 *h_nReco_pTGen = dynamic_cast<TH1 *>(hm->getHisto(get_histo_prefix() + "nReco_pTGen"));
166  assert(h_nReco_pTGen);
167 
168  // gen pT histogram
169  TH1 *h_nGen_pTGen = dynamic_cast<TH1 *>(hm->getHisto(get_histo_prefix() + "nGen_pTGen"));
170  assert(h_nGen_pTGen);
171 
172  // reco histogram plotted at gen eta
173  TH1 *h_nReco_etaGen = dynamic_cast<TH1 *>(hm->getHisto(get_histo_prefix() + "nReco_etaGen"));
174  assert(h_nReco_etaGen);
175 
176  // gen eta histogram
177  TH1 *h_nGen_etaGen = dynamic_cast<TH1 *>(hm->getHisto(get_histo_prefix() + "nGen_etaGen"));
178  assert(h_nGen_etaGen);
179 
180  // inv mass
181  TH1 *h_nGen_Pair_InvMassGen = dynamic_cast<TH1 *>(hm->getHisto(get_histo_prefix() + "nGen_Pair_InvMassGen"));
182  assert(h_nGen_etaGen);
183  // inv mass
184  TH1 *h_nReco_Pair_InvMassReco = dynamic_cast<TH1 *>(hm->getHisto(get_histo_prefix() + "nReco_Pair_InvMassReco"));
185  assert(h_nGen_etaGen);
186 
187  // n events and n tracks histogram
188  TH1 *h_norm = dynamic_cast<TH1 *>(hm->getHisto(get_histo_prefix() + "Normalization"));
189  assert(h_norm);
190  h_norm->Fill("Event", 1);
191 
192  //buffer for daugther particles
193  typedef std::set<std::pair<PHG4Particle *, SvtxTrack *>> truth_reco_set_t;
194  truth_reco_set_t truth_reco_set_pos;
195  truth_reco_set_t truth_reco_set_neg;
196 
197  // fill histograms that need truth information
198  if (!_truthContainer)
199  {
200  std::cout << "QAG4SimulationUpsilon::process_event - fatal error - missing _truthContainer! ";
201  return Fun4AllReturnCodes::ABORTRUN;
202  }
203 
204  PHG4TruthInfoContainer::ConstRange range = _truthContainer->GetPrimaryParticleRange();
205  for (PHG4TruthInfoContainer::ConstIterator iter = range.first; iter != range.second; ++iter)
206  {
207  // get the truth particle information
208  PHG4Particle *g4particle = iter->second;
209 
210  if (Verbosity())
211  {
212  std::cout << "QAG4SimulationUpsilon::process_event - processing ";
213  g4particle->identify();
214  }
215 
216  if (m_embeddingIDs.size() > 0)
217  {
218  //only analyze subset of particle with proper embedding IDs
219  int candidate_embedding_id = trutheval->get_embed(g4particle);
220  if (candidate_embedding_id < 0) candidate_embedding_id = -1;
221 
222  // skip if no match
223  if (m_embeddingIDs.find(candidate_embedding_id) == m_embeddingIDs.end()) continue;
224  }
225 
226  double gpx = g4particle->get_px();
227  double gpy = g4particle->get_py();
228  double gpz = g4particle->get_pz();
229  double gpt = 0;
230  double geta = NAN;
231 
232  if (gpx != 0 && gpy != 0)
233  {
234  TVector3 gv(gpx, gpy, gpz);
235  gpt = gv.Pt();
236  geta = gv.Eta();
237  // gphi = gv.Phi();
238  }
239  if (m_etaRange.first < geta and geta < m_etaRange.second)
240  {
241  if (Verbosity())
242  {
243  std::cout << "QAG4SimulationUpsilon::process_event - accept particle eta = " << geta << std::endl;
244  }
245  }
246  else
247  {
248  if (Verbosity())
249  std::cout << "QAG4SimulationUpsilon::process_event - ignore particle eta = " << geta << std::endl;
250  continue;
251  }
252 
253  const int pid = g4particle->get_pid();
254 
255  if (abs(pid) != abs(m_daughterAbsPID))
256  {
257  if (Verbosity())
258  std::cout << "QAG4SimulationUpsilon::process_event - ignore particle PID = " << pid << " as m_daughterAbsPID = " << m_daughterAbsPID << std::endl;
259  continue;
260  }
261 
262  TParticlePDG *pdg_p = TDatabasePDG::Instance()->GetParticle(pid);
263  if (!pdg_p)
264  {
265  std::cout << "QAG4SimulationUpsilon::process_event - Error - invalid particle ID = " << pid << std::endl;
266  continue;
267  }
268 
269  const double gcharge = pdg_p->Charge() / 3;
270  if (gcharge > 0)
271  {
272  h_norm->Fill("Truth Track+", 1);
273  }
274  else if (gcharge < 0)
275  {
276  h_norm->Fill("Truth Track-", 1);
277  }
278  else
279  {
280  if (Verbosity())
281  std::cout << "QAG4SimulationUpsilon::process_event - invalid neutral decay particle ID = " << pid << std::endl;
282  continue;
283  }
284  // h_norm->Fill("Truth Track", 1);
285 
286  h_nGen_pTGen->Fill(gpt);
287  h_nGen_etaGen->Fill(geta);
288 
289  // look for best matching track in reco data & get its information
290  SvtxTrack *track = trackeval->best_track_from(g4particle);
291  if (track)
292  {
293  h_nReco_etaGen->Fill(geta);
294  h_nReco_pTGen->Fill(gpt);
295 
296  double px = track->get_px();
297  double py = track->get_py();
298  double pz = track->get_pz();
299  double pt;
300  TVector3 v(px, py, pz);
301  pt = v.Pt();
302  // eta = v.Pt();
303  // phi = v.Pt();
304 
305  float pt_ratio = (gpt != 0) ? pt / gpt : 0;
306  h_pTRecoGenRatio->Fill(pt_ratio);
307  h_pTRecoGenRatio_pTGen->Fill(gpt, pt_ratio);
308  h_norm->Fill("Reco Track", 1);
309  }
310 
311  if (gcharge > 0)
312  {
313  truth_reco_set_pos.insert(std::make_pair(g4particle, track));
314  }
315  else if (gcharge < 0)
316  {
317  truth_reco_set_neg.insert(std::make_pair(g4particle, track));
318  }
319  } // for (PHG4TruthInfoContainer::ConstIterator iter = range.first; iter != range.second; ++iter)
320 
321  //building pairs with buffer for daugter particles
322  TParticlePDG *pdg_p = TDatabasePDG::Instance()->GetParticle(m_quarkoniaPID);
323  if (!pdg_p)
324  {
325  std::cout << "QAG4SimulationUpsilon::process_event - Fatal Error - invalid particle ID m_quarkoniaPID = " << m_quarkoniaPID << std::endl;
326 
327  return Fun4AllReturnCodes::ABORTRUN;
328  }
329  const double quarkonium_mass = pdg_p->Mass();
330  TParticlePDG *pdg_d = TDatabasePDG::Instance()->GetParticle(m_daughterAbsPID);
331  if (!pdg_d)
332  {
333  std::cout << "QAG4SimulationUpsilon::process_event - Fatal Error - invalid particle ID m_daughterAbsPID = " << m_daughterAbsPID << std::endl;
334 
335  return Fun4AllReturnCodes::ABORTRUN;
336  }
337  const double daughter_mass = pdg_d->Mass();
338 
339  for (const auto &pair_pos : truth_reco_set_pos)
340  for (const auto &pair_neg : truth_reco_set_neg)
341  {
342  assert(pair_pos.first);
343  assert(pair_neg.first);
344 
345  const CLHEP::HepLorentzVector gv_pos(
346  pair_pos.first->get_px(),
347  pair_pos.first->get_py(),
348  pair_pos.first->get_pz(),
349  pair_pos.first->get_e());
350 
351  const CLHEP::HepLorentzVector gv_neg(
352  pair_neg.first->get_px(),
353  pair_neg.first->get_py(),
354  pair_neg.first->get_pz(),
355  pair_neg.first->get_e());
356 
357  const CLHEP::HepLorentzVector gv_quakonium = gv_pos + gv_neg;
358 
359  if (fabs(quarkonium_mass - gv_quakonium.m()) > 1e-3)
360  {
361  if (Verbosity())
362  {
363  std::cout << "QAG4SimulationUpsilon::process_event - invalid pair with in compativle mass with " << quarkonium_mass << "GeV for PID = " << m_quarkoniaPID << ": " << std::endl;
364  pair_pos.first->identify();
365  pair_neg.first->identify();
366  }
367  continue;
368  }
369 
370  h_nGen_Pair_InvMassGen->Fill(gv_quakonium.m());
371  h_norm->Fill("Truth Upsilon in Acc.", 1);
372 
373  if (pair_pos.second and pair_neg.second)
374  {
375  CLHEP::HepLorentzVector v_pos;
376  CLHEP::HepLorentzVector v_neg;
377 
378  v_pos.setVectM(
379  CLHEP::Hep3Vector(
380  pair_pos.second->get_px(),
381  pair_pos.second->get_py(),
382  pair_pos.second->get_pz()),
383  daughter_mass);
384  v_neg.setVectM(
385  CLHEP::Hep3Vector(
386  pair_neg.second->get_px(),
387  pair_neg.second->get_py(),
388  pair_neg.second->get_pz()),
389  daughter_mass);
390 
391  const CLHEP::HepLorentzVector v_quakonium = v_pos + v_neg;
392 
393  h_nReco_Pair_InvMassReco->Fill(v_quakonium.m());
394  h_norm->Fill("Reco Upsilon", 1);
395 
396  } // if (pair_pos.second and pair_neg.second)
397 
398  } // for (const auto &pair_neg : truth_reco_set_neg)
399 
400  return Fun4AllReturnCodes::EVENT_OK;
401 }
402 
403 std::string
404 QAG4SimulationUpsilon::get_histo_prefix()
405 {
406  return std::string("h_") + Name() + std::string("_");
407 }