ATLAS Offline Software
JpsiPlusDpstCascade.cxx
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1 /*
2  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
3 */
5 // JpsiPlusDpstCascade.cxx, (c) ATLAS Detector software
7 #include "DerivationFrameworkBPhys/JpsiPlusDpstCascade.h"
8 #include "TrkVertexFitterInterfaces/IVertexFitter.h"
9 #include "TrkVKalVrtFitter/TrkVKalVrtFitter.h"
10 #include "TrkVertexAnalysisUtils/V0Tools.h"
11 #include "DerivationFrameworkBPhys/CascadeTools.h"
12 #include "DerivationFrameworkBPhys/BPhysPVCascadeTools.h"
13 #include "xAODTracking/VertexAuxContainer.h"
14 #include "xAODBPhys/BPhysHypoHelper.h"
15 #include <algorithm>
16 #include "xAODTracking/VertexContainer.h"
17 #include "HepPDT/ParticleDataTable.hh"
18 #include "TruthUtils/HepMCHelpers.h"
19 
20 #include "TrkVKalVrtFitter/VxCascadeInfo.h"
21 
22 namespace DerivationFramework {
23  typedef ElementLink<xAOD::VertexContainer> VertexLink;
24  typedef std::vector<VertexLink> VertexLinkVector;
25  typedef std::vector<const xAOD::TrackParticle*> TrackBag;
26 
27 
28  StatusCode JpsiPlusDpstCascade::initialize() {
29 
30  // retrieving vertex Fitter
31  ATH_CHECK( m_iVertexFitter.retrieve());
32 
33  // retrieving the V0 tools
34  ATH_CHECK( m_V0Tools.retrieve());
35 
36  // retrieving the Cascade tools
37  ATH_CHECK( m_CascadeTools.retrieve());
38 
39  // Get the beam spot service
40  ATH_CHECK(m_eventInfo_key.initialize());
41 
42  ATH_CHECK( m_partPropSvc.retrieve() );
43  auto pdt = m_partPropSvc->PDT();
44 
45  // retrieve particle masses
46  if(m_mass_jpsi < 0. ) m_mass_jpsi = BPhysPVCascadeTools::getParticleMass(pdt, MC::JPSI);
47  if(m_vtx0MassHypo < 0.) m_vtx0MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::BCPLUS);
48  if(m_vtx1MassHypo < 0.) m_vtx1MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::D0);
49 
50  if(m_vtx0Daug1MassHypo < 0.) m_vtx0Daug1MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::MUON);
51  if(m_vtx0Daug2MassHypo < 0.) m_vtx0Daug2MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::MUON);
52  if(m_vtx0Daug3MassHypo < 0.) m_vtx0Daug3MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::PIPLUS);
53  if(m_vtx1Daug1MassHypo < 0.) m_vtx1Daug1MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::PIPLUS);
54  if(m_vtx1Daug2MassHypo < 0.) m_vtx1Daug2MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::KPLUS);
55 
56  return StatusCode::SUCCESS;
57  }
58 
59 
60  StatusCode JpsiPlusDpstCascade::addBranches() const
61  {
62  std::vector<Trk::VxCascadeInfo*> cascadeinfoContainer;
63  constexpr int topoN = 2;
64  std::array<xAOD::VertexContainer*, topoN> Vtxwritehandles;
65  std::array<xAOD::VertexAuxContainer*, topoN> Vtxwritehandlesaux;
66  if(m_cascadeOutputsKeys.size() !=topoN) { ATH_MSG_FATAL("Incorrect number of VtxContainers"); return StatusCode::FAILURE; }
67 
68  for(int i =0; i<topoN;i++){
69  Vtxwritehandles[i] = new xAOD::VertexContainer();
70  Vtxwritehandlesaux[i] = new xAOD::VertexAuxContainer();
71  Vtxwritehandles[i]->setStore(Vtxwritehandlesaux[i]);
72  ATH_CHECK(evtStore()->record(Vtxwritehandles[i] , m_cascadeOutputsKeys[i] ));
73  ATH_CHECK(evtStore()->record(Vtxwritehandlesaux[i], m_cascadeOutputsKeys[i] + "Aux."));
74  }
75 
76  //----------------------------------------------------
77  // retrieve primary vertices
78  //----------------------------------------------------
79  const xAOD::Vertex * primaryVertex(nullptr);
80  const xAOD::VertexContainer *pvContainer(nullptr);
81  ATH_CHECK(evtStore()->retrieve(pvContainer, m_VxPrimaryCandidateName));
82  ATH_MSG_DEBUG("Found " << m_VxPrimaryCandidateName << " in StoreGate!");
83 
84  if (pvContainer->size()==0){
85  ATH_MSG_WARNING("You have no primary vertices: " << pvContainer->size());
86  return StatusCode::RECOVERABLE;
87  } else {
88  primaryVertex = (*pvContainer)[0];
89  }
90 
91  //----------------------------------------------------
92  // Try to retrieve refitted primary vertices
93  //----------------------------------------------------
94  xAOD::VertexContainer* refPvContainer = nullptr;
95  xAOD::VertexAuxContainer* refPvAuxContainer = nullptr;
96  if (m_refitPV) {
97  if (evtStore()->contains<xAOD::VertexContainer>(m_refPVContainerName)) {
98  // refitted PV container exists. Get it from the store gate
99  ATH_CHECK(evtStore()->retrieve(refPvContainer , m_refPVContainerName ));
100  ATH_CHECK(evtStore()->retrieve(refPvAuxContainer, m_refPVContainerName + "Aux."));
101  } else {
102  // refitted PV container does not exist. Create a new one.
103  refPvContainer = new xAOD::VertexContainer;
104  refPvAuxContainer = new xAOD::VertexAuxContainer;
105  refPvContainer->setStore(refPvAuxContainer);
106  ATH_CHECK(evtStore()->record(refPvContainer , m_refPVContainerName));
107  ATH_CHECK(evtStore()->record(refPvAuxContainer, m_refPVContainerName+"Aux."));
108  }
109  }
110 
111  ATH_CHECK(performSearch(&cascadeinfoContainer));
112 
113  SG::ReadHandle<xAOD::EventInfo> evt(m_eventInfo_key);
114  if(not evt.isValid()) ATH_MSG_ERROR("Cannot Retrieve " << evt.key() );
115  BPhysPVCascadeTools helper(&(*m_CascadeTools), evt.cptr());
116  helper.SetMinNTracksInPV(m_PV_minNTracks);
117 
118  // Decorators for the main vertex: chi2, ndf, pt and pt error, plus the D0 vertex variables
119  SG::AuxElement::Decorator<VertexLinkVector> CascadeLinksDecor("CascadeVertexLinks");
120  SG::AuxElement::Decorator<VertexLinkVector> JpsipiLinksDecor("JpsipiVertexLinks");
121  SG::AuxElement::Decorator<VertexLinkVector> D0LinksDecor("D0VertexLinks");
122  SG::AuxElement::Decorator<float> chi2_decor("ChiSquared");
123  SG::AuxElement::Decorator<float> ndof_decor("NumberDoF");
124  SG::AuxElement::Decorator<float> Pt_decor("Pt");
125  SG::AuxElement::Decorator<float> PtErr_decor("PtErr");
126  SG::AuxElement::Decorator<float> Mass_svdecor("D0_mass");
127  SG::AuxElement::Decorator<float> MassErr_svdecor("D0_massErr");
128  SG::AuxElement::Decorator<float> Pt_svdecor("D0_Pt");
129  SG::AuxElement::Decorator<float> PtErr_svdecor("D0_PtErr");
130  SG::AuxElement::Decorator<float> Lxy_svdecor("D0_Lxy");
131  SG::AuxElement::Decorator<float> LxyErr_svdecor("D0_LxyErr");
132  SG::AuxElement::Decorator<float> Tau_svdecor("D0_Tau");
133  SG::AuxElement::Decorator<float> TauErr_svdecor("D0_TauErr");
134 
135  SG::AuxElement::Decorator<float> MassMumu_decor("Mumu_mass");
136  SG::AuxElement::Decorator<float> MassKpi_svdecor("Kpi_mass");
137  SG::AuxElement::Decorator<float> MassJpsi_decor("Jpsi_mass");
138  SG::AuxElement::Decorator<float> MassPiD0_decor("PiD0_mass");
139 
140  ATH_MSG_DEBUG("cascadeinfoContainer size " << cascadeinfoContainer.size());
141 
142  // Get Jpsi+pi container and identify the input Jpsi+pi
143  const xAOD::VertexContainer *jpsipiContainer(nullptr);
144  ATH_CHECK(evtStore()->retrieve(jpsipiContainer , m_vertexContainerKey ));
145  const xAOD::VertexContainer *d0Container(nullptr);
146  ATH_CHECK(evtStore()->retrieve(d0Container , m_vertexD0ContainerKey ));
147 
148  for (Trk::VxCascadeInfo* x : cascadeinfoContainer) {
149  if(x==nullptr) {
150  ATH_MSG_ERROR("cascadeinfoContainer is null");
151  //x is dereferenced if we pass this
152  return StatusCode::FAILURE;
153  }
154 
155  // the cascade fitter returns:
156  // std::vector<xAOD::Vertex*>, each xAOD::Vertex contains the refitted track parameters (perigee at the vertex position)
157  // vertices[iv] the links to the original TPs and a covariance of size 3+5*NTRK; the chi2 of the total fit
158  // is split between the cascade vertices as per track contribution
159  // std::vector< std::vector<TLorentzVector> >, each std::vector<TLorentzVector> contains the refitted momenta (TLorentzVector)
160  // momenta[iv][...] of all tracks in the corresponding vertex, including any pseudotracks (from cascade vertices)
161  // originating in this vertex; the masses are as assigned in the cascade fit
162  // std::vector<Amg::MatrixX>, the corresponding covariance matrices in momentum space
163  // covariance[iv]
164  // int nDoF, double Chi2
165  //
166  // the invariant mass, pt, lifetime etc. errors should be calculated using the covariance matrices in momentum space as these
167  // take into account the full track-track and track-vertex correlations
168  //
169  // in the case of Jpsi+V0: vertices[0] is the V0 vertex, vertices[1] is the B/Lambda_b(bar) vertex, containing the 2 Jpsi tracks.
170  // The covariance terms between the two vertices are not stored. In momentum space momenta[0] contains the 2 V0 tracks,
171  // their momenta add up to the momentum of the 3rd track in momenta[1], the first two being the Jpsi tracks
172 
173  const std::vector<xAOD::Vertex*> &cascadeVertices = x->vertices();
174  if(cascadeVertices.size()!=topoN)
175  ATH_MSG_ERROR("Incorrect number of vertices");
176  if(cascadeVertices[0] == nullptr || cascadeVertices[1] == nullptr) ATH_MSG_ERROR("Error null vertex");
177  // Keep vertices (bear in mind that they come in reverse order!)
178  for(int i =0;i<topoN;i++) Vtxwritehandles[i]->push_back(cascadeVertices[i]);
179 
180  x->setSVOwnership(false); // Prevent Container from deleting vertices
181  const auto mainVertex = cascadeVertices[1]; // this is the B_c+/- vertex
182  const std::vector< std::vector<TLorentzVector> > &moms = x->getParticleMoms();
183 
184  // Set links to cascade vertices
185  std::vector<const xAOD::Vertex*> verticestoLink;
186  verticestoLink.push_back(cascadeVertices[0]);
187  if(Vtxwritehandles[1] == nullptr) ATH_MSG_ERROR("Vtxwritehandles[1] is null");
188  if(!BPhysPVCascadeTools::LinkVertices(CascadeLinksDecor, verticestoLink, Vtxwritehandles[0], cascadeVertices[1]))
189  ATH_MSG_ERROR("Error decorating with cascade vertices");
190 
191  // Identify the input Jpsi+pi
192  const xAOD::Vertex* jpsipiVertex = BPhysPVCascadeTools::FindVertex<3>(jpsipiContainer, cascadeVertices[1]);
193  ATH_MSG_DEBUG("1 pt Jpsi+pi tracks " << cascadeVertices[1]->trackParticle(0)->pt() << ", " << cascadeVertices[1]->trackParticle(1)->pt() << ", " << cascadeVertices[1]->trackParticle(2)->pt());
194  if (jpsipiVertex) ATH_MSG_DEBUG("2 pt Jpsi+pi tracks " << jpsipiVertex->trackParticle(0)->pt() << ", " << jpsipiVertex->trackParticle(1)->pt() << ", " << jpsipiVertex->trackParticle(2)->pt());
195 
196  // Identify the input D0
197  const xAOD::Vertex* d0Vertex = BPhysPVCascadeTools::FindVertex<2>(d0Container, cascadeVertices[0]);;
198  ATH_MSG_DEBUG("1 pt D0 tracks " << cascadeVertices[0]->trackParticle(0)->pt() << ", " << cascadeVertices[0]->trackParticle(1)->pt());
199  if (d0Vertex) ATH_MSG_DEBUG("2 pt D0 tracks " << d0Vertex->trackParticle(0)->pt() << ", " << d0Vertex->trackParticle(1)->pt());
200 
201  // Set links to input vertices
202  std::vector<const xAOD::Vertex*> jpsipiVerticestoLink;
203  if (jpsipiVertex) jpsipiVerticestoLink.push_back(jpsipiVertex);
204  else ATH_MSG_WARNING("Could not find linking Jpsi+pi");
205  if(!BPhysPVCascadeTools::LinkVertices(JpsipiLinksDecor, jpsipiVerticestoLink, jpsipiContainer, cascadeVertices[1]))
206  ATH_MSG_ERROR("Error decorating with Jpsi+pi vertices");
207 
208  std::vector<const xAOD::Vertex*> d0VerticestoLink;
209  if (d0Vertex) d0VerticestoLink.push_back(d0Vertex);
210  else ATH_MSG_WARNING("Could not find linking D0");
211  if(!BPhysPVCascadeTools::LinkVertices(D0LinksDecor, d0VerticestoLink, d0Container, cascadeVertices[1]))
212  ATH_MSG_ERROR("Error decorating with D0 vertices");
213 
214  bool tagD0(true);
215  if (jpsipiVertex){
216  if(abs(m_Dx_pid)==421 && (jpsipiVertex->trackParticle(2)->charge()==-1)) tagD0 = false;
217  }
218 
219  double mass_b = m_vtx0MassHypo;
220  double mass_d0 = m_vtx1MassHypo;
221  std::vector<double> massesJpsipi;
222  massesJpsipi.push_back(m_vtx0Daug1MassHypo);
223  massesJpsipi.push_back(m_vtx0Daug2MassHypo);
224  massesJpsipi.push_back(m_vtx0Daug3MassHypo);
225  std::vector<double> massesD0;
226  if(tagD0){
227  massesD0.push_back(m_vtx1Daug1MassHypo);
228  massesD0.push_back(m_vtx1Daug2MassHypo);
229  }else{ // Change the oreder of masses for D*-->D0bar pi-, D0bar->K+pi-
230  massesD0.push_back(m_vtx1Daug2MassHypo);
231  massesD0.push_back(m_vtx1Daug1MassHypo);
232  }
233  std::vector<double> Masses;
234  Masses.push_back(m_vtx0Daug1MassHypo);
235  Masses.push_back(m_vtx0Daug2MassHypo);
236  Masses.push_back(m_vtx0Daug3MassHypo);
237  Masses.push_back(m_vtx1MassHypo);
238 
239  // loop over candidates -- Don't apply PV_minNTracks requirement here
240  // because it may result in exclusion of the high-pt PV.
241  // get good PVs
242 
243  xAOD::BPhysHypoHelper vtx(m_hypoName, mainVertex);
244 
245  // Get refitted track momenta from all vertices, charged tracks only
246  BPhysPVCascadeTools::SetVectorInfo(vtx, x);
247 
248  // Decorate main vertex
249  //
250  // 1.a) mass, mass error
251  BPHYS_CHECK( vtx.setMass(m_CascadeTools->invariantMass(moms[1])) );
252  BPHYS_CHECK( vtx.setMassErr(m_CascadeTools->invariantMassError(moms[1],x->getCovariance()[1])) );
253  // 1.b) pt and pT error (the default pt of mainVertex is != the pt of the full cascade fit!)
254  Pt_decor(*mainVertex) = m_CascadeTools->pT(moms[1]);
255  PtErr_decor(*mainVertex) = m_CascadeTools->pTError(moms[1],x->getCovariance()[1]);
256  // 1.c) chi2 and ndof (the default chi2 of mainVertex is != the chi2 of the full cascade fit!)
257  chi2_decor(*mainVertex) = x->fitChi2();
258  ndof_decor(*mainVertex) = x->nDoF();
259 
260  float massMumu = 0.;
261  if (jpsipiVertex) {
262  TLorentzVector p4_mu1, p4_mu2;
263  p4_mu1.SetPtEtaPhiM(jpsipiVertex->trackParticle(0)->pt(),
264  jpsipiVertex->trackParticle(0)->eta(),
265  jpsipiVertex->trackParticle(0)->phi(), m_vtx0Daug1MassHypo);
266  p4_mu2.SetPtEtaPhiM(jpsipiVertex->trackParticle(1)->pt(),
267  jpsipiVertex->trackParticle(1)->eta(),
268  jpsipiVertex->trackParticle(1)->phi(), m_vtx0Daug2MassHypo);
269  massMumu = (p4_mu1 + p4_mu2).M();
270  }
271  MassMumu_decor(*mainVertex) = massMumu;
272 
273  float massKpi = 0.;
274  if (d0Vertex) {
275  TLorentzVector p4_ka, p4_pi;
276  if(tagD0){
277  p4_pi.SetPtEtaPhiM(d0Vertex->trackParticle(0)->pt(),
278  d0Vertex->trackParticle(0)->eta(),
279  d0Vertex->trackParticle(0)->phi(), m_vtx1Daug1MassHypo);
280  p4_ka.SetPtEtaPhiM(d0Vertex->trackParticle(1)->pt(),
281  d0Vertex->trackParticle(1)->eta(),
282  d0Vertex->trackParticle(1)->phi(), m_vtx1Daug2MassHypo);
283  }else{ // Change the oreder of masses for D*-->D0bar pi-, D0bar->K+pi-
284  p4_pi.SetPtEtaPhiM(d0Vertex->trackParticle(1)->pt(),
285  d0Vertex->trackParticle(1)->eta(),
286  d0Vertex->trackParticle(1)->phi(), m_vtx1Daug1MassHypo);
287  p4_ka.SetPtEtaPhiM(d0Vertex->trackParticle(0)->pt(),
288  d0Vertex->trackParticle(0)->eta(),
289  d0Vertex->trackParticle(0)->phi(), m_vtx1Daug2MassHypo);
290  }
291  massKpi = (p4_ka + p4_pi).M();
292  }
293  MassKpi_svdecor(*mainVertex) = massKpi;
294  MassJpsi_decor(*mainVertex) = (moms[1][0] + moms[1][1]).M();
295  MassPiD0_decor(*mainVertex) = (moms[1][2] + moms[1][3]).M();
296 
297 
298  ATH_CHECK(helper.FillCandwithRefittedVertices(m_refitPV, pvContainer,
299  refPvContainer, &(*m_pvRefitter), m_PV_max, m_DoVertexType, x, 1, mass_b, vtx));
300 
301  // 4) decorate the main vertex with D0 vertex mass, pt, lifetime and lxy values (plus errors)
302  // D0 points to the main vertex, so lifetime and lxy are w.r.t the main vertex
303  Mass_svdecor(*mainVertex) = m_CascadeTools->invariantMass(moms[0]);
304  MassErr_svdecor(*mainVertex) = m_CascadeTools->invariantMassError(moms[0],x->getCovariance()[0]);
305  Pt_svdecor(*mainVertex) = m_CascadeTools->pT(moms[0]);
306  PtErr_svdecor(*mainVertex) = m_CascadeTools->pTError(moms[0],x->getCovariance()[0]);
307  Lxy_svdecor(*mainVertex) = m_CascadeTools->lxy(moms[0],cascadeVertices[0],cascadeVertices[1]);
308  LxyErr_svdecor(*mainVertex) = m_CascadeTools->lxyError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1]);
309  Tau_svdecor(*mainVertex) = m_CascadeTools->tau(moms[0],cascadeVertices[0],cascadeVertices[1]);
310  TauErr_svdecor(*mainVertex) = m_CascadeTools->tauError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1]);
311 
312  // Some checks in DEBUG mode
313  ATH_MSG_DEBUG("chi2 " << x->fitChi2()
314  << " chi2_1 " << m_V0Tools->chisq(cascadeVertices[0])
315  << " chi2_2 " << m_V0Tools->chisq(cascadeVertices[1])
316  << " vprob " << m_CascadeTools->vertexProbability(x->nDoF(),x->fitChi2()));
317  ATH_MSG_DEBUG("ndf " << x->nDoF() << " ndf_1 " << m_V0Tools->ndof(cascadeVertices[0]) << " ndf_2 " << m_V0Tools->ndof(cascadeVertices[1]));
318  ATH_MSG_DEBUG("V0Tools mass_d0 " << m_V0Tools->invariantMass(cascadeVertices[0],massesD0)
319  << " error " << m_V0Tools->invariantMassError(cascadeVertices[0],massesD0)
320  << " mass_J " << m_V0Tools->invariantMass(cascadeVertices[1],massesJpsipi)
321  << " error " << m_V0Tools->invariantMassError(cascadeVertices[1],massesJpsipi));
322  // masses and errors, using track masses assigned in the fit
323  double Mass_B = m_CascadeTools->invariantMass(moms[1]);
324  double Mass_D0 = m_CascadeTools->invariantMass(moms[0]);
325  double Mass_B_err = m_CascadeTools->invariantMassError(moms[1],x->getCovariance()[1]);
326  double Mass_D0_err = m_CascadeTools->invariantMassError(moms[0],x->getCovariance()[0]);
327  ATH_MSG_DEBUG("Mass_B " << Mass_B << " Mass_D0 " << Mass_D0);
328  ATH_MSG_DEBUG("Mass_B_err " << Mass_B_err << " Mass_D0_err " << Mass_D0_err);
329  double mprob_B = m_CascadeTools->massProbability(mass_b,Mass_B,Mass_B_err);
330  double mprob_D0 = m_CascadeTools->massProbability(mass_d0,Mass_D0,Mass_D0_err);
331  ATH_MSG_DEBUG("mprob_B " << mprob_B << " mprob_D0 " << mprob_D0);
332  // masses and errors, assigning user defined track masses
333  ATH_MSG_DEBUG("Mass_b " << m_CascadeTools->invariantMass(moms[1],Masses)
334  << " Mass_d0 " << m_CascadeTools->invariantMass(moms[0],massesD0));
335  ATH_MSG_DEBUG("Mass_b_err " << m_CascadeTools->invariantMassError(moms[1],x->getCovariance()[1],Masses)
336  << " Mass_d0_err " << m_CascadeTools->invariantMassError(moms[0],x->getCovariance()[0],massesD0));
337  ATH_MSG_DEBUG("pt_b " << m_CascadeTools->pT(moms[1])
338  << " pt_d " << m_CascadeTools->pT(moms[0])
339  << " pt_d0 " << m_V0Tools->pT(cascadeVertices[0]));
340  ATH_MSG_DEBUG("ptErr_b " << m_CascadeTools->pTError(moms[1],x->getCovariance()[1])
341  << " ptErr_d " << m_CascadeTools->pTError(moms[0],x->getCovariance()[0])
342  << " ptErr_d0 " << m_V0Tools->pTError(cascadeVertices[0]));
343  ATH_MSG_DEBUG("lxy_B " << m_V0Tools->lxy(cascadeVertices[1],primaryVertex) << " lxy_D " << m_V0Tools->lxy(cascadeVertices[0],cascadeVertices[1]));
344  ATH_MSG_DEBUG("lxy_b " << m_CascadeTools->lxy(moms[1],cascadeVertices[1],primaryVertex) << " lxy_d " << m_CascadeTools->lxy(moms[0],cascadeVertices[0],cascadeVertices[1]));
345  ATH_MSG_DEBUG("lxyErr_b " << m_CascadeTools->lxyError(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex)
346  << " lxyErr_d " << m_CascadeTools->lxyError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1])
347  << " lxyErr_d0 " << m_V0Tools->lxyError(cascadeVertices[0],cascadeVertices[1]));
348  ATH_MSG_DEBUG("tau_B " << m_CascadeTools->tau(moms[1],cascadeVertices[1],primaryVertex,mass_b)
349  << " tau_d0 " << m_V0Tools->tau(cascadeVertices[0],cascadeVertices[1],massesD0));
350  ATH_MSG_DEBUG("tau_b " << m_CascadeTools->tau(moms[1],cascadeVertices[1],primaryVertex)
351  << " tau_d " << m_CascadeTools->tau(moms[0],cascadeVertices[0],cascadeVertices[1])
352  << " tau_D " << m_CascadeTools->tau(moms[0],cascadeVertices[0],cascadeVertices[1],mass_d0));
353  ATH_MSG_DEBUG("tauErr_b " << m_CascadeTools->tauError(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex)
354  << " tauErr_d " << m_CascadeTools->tauError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1])
355  << " tauErr_d0 " << m_V0Tools->tauError(cascadeVertices[0],cascadeVertices[1],massesD0));
356  ATH_MSG_DEBUG("TauErr_b " << m_CascadeTools->tauError(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex,mass_b)
357  << " TauErr_d " << m_CascadeTools->tauError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1],mass_d0)
358  << " TauErr_d0 " << m_V0Tools->tauError(cascadeVertices[0],cascadeVertices[1],massesD0,mass_d0));
359 
360  ATH_MSG_DEBUG("CascadeTools main vert wrt PV " << " CascadeTools SV " << " V0Tools SV");
361  ATH_MSG_DEBUG("a0z " << m_CascadeTools->a0z(moms[1],cascadeVertices[1],primaryVertex)
362  << ", " << m_CascadeTools->a0z(moms[0],cascadeVertices[0],cascadeVertices[1])
363  << ", " << m_V0Tools->a0z(cascadeVertices[0],cascadeVertices[1]));
364  ATH_MSG_DEBUG("a0zErr " << m_CascadeTools->a0zError(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex)
365  << ", " << m_CascadeTools->a0zError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1])
366  << ", " << m_V0Tools->a0zError(cascadeVertices[0],cascadeVertices[1]));
367  ATH_MSG_DEBUG("a0xy " << m_CascadeTools->a0xy(moms[1],cascadeVertices[1],primaryVertex)
368  << ", " << m_CascadeTools->a0xy(moms[0],cascadeVertices[0],cascadeVertices[1])
369  << ", " << m_V0Tools->a0xy(cascadeVertices[0],cascadeVertices[1]));
370  ATH_MSG_DEBUG("a0xyErr " << m_CascadeTools->a0xyError(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex)
371  << ", " << m_CascadeTools->a0xyError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1])
372  << ", " << m_V0Tools->a0xyError(cascadeVertices[0],cascadeVertices[1]));
373  ATH_MSG_DEBUG("a0 " << m_CascadeTools->a0(moms[1],cascadeVertices[1],primaryVertex)
374  << ", " << m_CascadeTools->a0(moms[0],cascadeVertices[0],cascadeVertices[1])
375  << ", " << m_V0Tools->a0(cascadeVertices[0],cascadeVertices[1]));
376  ATH_MSG_DEBUG("a0Err " << m_CascadeTools->a0Error(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex)
377  << ", " << m_CascadeTools->a0Error(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1])
378  << ", " << m_V0Tools->a0Error(cascadeVertices[0],cascadeVertices[1]));
379  ATH_MSG_DEBUG("x0 " << m_V0Tools->vtx(cascadeVertices[0]).x() << " y0 " << m_V0Tools->vtx(cascadeVertices[0]).y() << " z0 " << m_V0Tools->vtx(cascadeVertices[0]).z());
380  ATH_MSG_DEBUG("x1 " << m_V0Tools->vtx(cascadeVertices[1]).x() << " y1 " << m_V0Tools->vtx(cascadeVertices[1]).y() << " z1 " << m_V0Tools->vtx(cascadeVertices[1]).z());
381  ATH_MSG_DEBUG("X0 " << primaryVertex->x() << " Y0 " << primaryVertex->y() << " Z0 " << primaryVertex->z());
382  ATH_MSG_DEBUG("rxy0 " << m_V0Tools->rxy(cascadeVertices[0]) << " rxyErr0 " << m_V0Tools->rxyError(cascadeVertices[0]));
383  ATH_MSG_DEBUG("rxy1 " << m_V0Tools->rxy(cascadeVertices[1]) << " rxyErr1 " << m_V0Tools->rxyError(cascadeVertices[1]));
384  ATH_MSG_DEBUG("Rxy0 wrt PV " << m_V0Tools->rxy(cascadeVertices[0],primaryVertex) << " RxyErr0 wrt PV " << m_V0Tools->rxyError(cascadeVertices[0],primaryVertex));
385  ATH_MSG_DEBUG("Rxy1 wrt PV " << m_V0Tools->rxy(cascadeVertices[1],primaryVertex) << " RxyErr1 wrt PV " << m_V0Tools->rxyError(cascadeVertices[1],primaryVertex));
386  ATH_MSG_DEBUG("number of covariance matrices " << (x->getCovariance()).size());
387  } // loop over cascadeinfoContainer
388 
389  // Deleting cascadeinfo since this won't be stored.
390  // Vertices have been kept in m_cascadeOutputs and should be owned by their container
391  for (auto x : cascadeinfoContainer) delete x;
392 
393  return StatusCode::SUCCESS;
394  }
395 
396 
397  JpsiPlusDpstCascade::JpsiPlusDpstCascade(const std::string& t, const std::string& n, const IInterface* p) : AthAlgTool(t,n,p),
398  m_vertexContainerKey(""),
399  m_vertexD0ContainerKey(""),
400  m_cascadeOutputsKeys{ "JpsiPlusDpstCascadeVtx1", "JpsiPlusDpstCascadeVtx2" },
401  m_VxPrimaryCandidateName("PrimaryVertices"),
402  m_jpsiMassLower(0.0),
403  m_jpsiMassUpper(10000.0),
404  m_jpsipiMassLower(0.0),
405  m_jpsipiMassUpper(10000.0),
406  m_D0MassLower(0.0),
407  m_D0MassUpper(10000.0),
408  m_DstMassLower(0.0),
409  m_DstMassUpper(10000.0),
410  m_MassLower(0.0),
411  m_MassUpper(20000.0),
412  m_vtx0MassHypo(-1),
413  m_vtx1MassHypo(-1),
414  m_vtx0Daug1MassHypo(-1),
415  m_vtx0Daug2MassHypo(-1),
416  m_vtx0Daug3MassHypo(-1),
417  m_vtx1Daug1MassHypo(-1),
418  m_vtx1Daug2MassHypo(-1),
419  m_mass_jpsi(-1),
420  m_Dx_pid(421),
421  m_constrD0(true),
422  m_constrJpsi(true),
423  m_chi2cut(-1.0),
424  m_iVertexFitter("Trk::TrkVKalVrtFitter"),
425  m_pvRefitter("Analysis::PrimaryVertexRefitter"),
426  m_V0Tools("Trk::V0Tools"),
427  m_CascadeTools("DerivationFramework::CascadeTools")
428  {
429  declareProperty("JpsipiVertices", m_vertexContainerKey);
430  declareProperty("D0Vertices", m_vertexD0ContainerKey);
431  declareProperty("VxPrimaryCandidateName", m_VxPrimaryCandidateName);
432  declareProperty("RefPVContainerName", m_refPVContainerName = "RefittedPrimaryVertices");
433  declareProperty("JpsiMassLowerCut", m_jpsiMassLower);
434  declareProperty("JpsiMassUpperCut", m_jpsiMassUpper);
435  declareProperty("JpsipiMassLowerCut", m_jpsipiMassLower);
436  declareProperty("JpsipiMassUpperCut", m_jpsipiMassUpper);
437  declareProperty("D0MassLowerCut", m_D0MassLower);
438  declareProperty("D0MassUpperCut", m_D0MassUpper);
439  declareProperty("DstMassLowerCut", m_DstMassLower);
440  declareProperty("DstMassUpperCut", m_DstMassUpper);
441  declareProperty("MassLowerCut", m_MassLower);
442  declareProperty("MassUpperCut", m_MassUpper);
443  declareProperty("HypothesisName", m_hypoName = "Bc");
444  declareProperty("Vtx0MassHypo", m_vtx0MassHypo);
445  declareProperty("Vtx1MassHypo", m_vtx1MassHypo);
446  declareProperty("Vtx0Daug1MassHypo", m_vtx0Daug1MassHypo);
447  declareProperty("Vtx0Daug2MassHypo", m_vtx0Daug2MassHypo);
448  declareProperty("Vtx0Daug3MassHypo", m_vtx0Daug3MassHypo);
449  declareProperty("Vtx1Daug1MassHypo", m_vtx1Daug1MassHypo);
450  declareProperty("Vtx1Daug2MassHypo", m_vtx1Daug2MassHypo);
451  declareProperty("JpsiMass", m_mass_jpsi);
452  declareProperty("DxHypothesis", m_Dx_pid);
453  declareProperty("ApplyD0MassConstraint", m_constrD0);
454  declareProperty("ApplyJpsiMassConstraint", m_constrJpsi);
455  declareProperty("Chi2Cut", m_chi2cut);
456  declareProperty("RefitPV", m_refitPV = true);
457  declareProperty("MaxnPV", m_PV_max = 999);
458  declareProperty("MinNTracksInPV", m_PV_minNTracks = 0);
459  declareProperty("DoVertexType", m_DoVertexType = 7);
460  declareProperty("TrkVertexFitterTool", m_iVertexFitter);
461  declareProperty("PVRefitter", m_pvRefitter);
462  declareProperty("V0Tools", m_V0Tools);
463  declareProperty("CascadeTools", m_CascadeTools);
464  declareProperty("CascadeVertexCollections", m_cascadeOutputsKeys);
465  }
466 
467  JpsiPlusDpstCascade::~JpsiPlusDpstCascade(){ }
468 
469  StatusCode JpsiPlusDpstCascade::performSearch(std::vector<Trk::VxCascadeInfo*> *cascadeinfoContainer) const
470  {
471  ATH_MSG_DEBUG( "JpsiPlusDpstCascade::performSearch" );
472  assert(cascadeinfoContainer!=nullptr);
473 
474  // Get TrackParticle container (for setting links to the original tracks)
475  const xAOD::TrackParticleContainer *trackContainer(nullptr);
476  ATH_CHECK(evtStore()->retrieve(trackContainer , "InDetTrackParticles" ));
477 
478  // Get Jpsi+pi container
479  const xAOD::VertexContainer *jpsipiContainer(nullptr);
480  ATH_CHECK(evtStore()->retrieve(jpsipiContainer , m_vertexContainerKey ));
481 
482  // Get D0 container
483  const xAOD::VertexContainer *d0Container(nullptr);
484  ATH_CHECK(evtStore()->retrieve(d0Container , m_vertexD0ContainerKey ));
485 
486  double mass_d0 = m_vtx1MassHypo;
487  std::vector<const xAOD::TrackParticle*> tracksJpsipi;
488  std::vector<const xAOD::TrackParticle*> tracksJpsi;
489  std::vector<const xAOD::TrackParticle*> tracksD0;
490  std::vector<const xAOD::TrackParticle*> tracksBc;
491  std::vector<double> massesJpsipi;
492  massesJpsipi.push_back(m_vtx0Daug1MassHypo);
493  massesJpsipi.push_back(m_vtx0Daug2MassHypo);
494  massesJpsipi.push_back(m_vtx0Daug3MassHypo);
495  std::vector<double> massesD0;
496  massesD0.push_back(m_vtx1Daug1MassHypo);
497  massesD0.push_back(m_vtx1Daug2MassHypo);
498  std::vector<double> massesD0b; // Change the oreder of masses for D*-->D0bar pi-, D0bar->K+pi-
499  massesD0b.push_back(m_vtx1Daug2MassHypo);
500  massesD0b.push_back(m_vtx1Daug1MassHypo);
501  std::vector<double> Masses;
502  Masses.push_back(m_vtx0Daug1MassHypo);
503  Masses.push_back(m_vtx0Daug2MassHypo);
504  Masses.push_back(m_vtx0Daug3MassHypo);
505  Masses.push_back(m_vtx1MassHypo);
506 
507  // Select J/psi pi+ candidates before calling cascade fit
508  std::vector<const xAOD::Vertex*> selectedJpsipiCandidates;
509  for(auto vxcItr=jpsipiContainer->cbegin(); vxcItr!=jpsipiContainer->cend(); ++vxcItr) {
510 
511  // Check the passed flag first
512  const xAOD::Vertex* vtx = *vxcItr;
513  SG::AuxElement::Accessor<Char_t> flagAcc1("passed_Jpsipi");
514  if(flagAcc1.isAvailable(*vtx)){
515  if(!flagAcc1(*vtx)) continue;
516  }
517 
518  // Check J/psi candidate invariant mass and skip if need be
519  TLorentzVector p4Mup_in, p4Mum_in;
520  p4Mup_in.SetPtEtaPhiM((*vxcItr)->trackParticle(0)->pt(),
521  (*vxcItr)->trackParticle(0)->eta(),
522  (*vxcItr)->trackParticle(0)->phi(), m_vtx0Daug1MassHypo);
523  p4Mum_in.SetPtEtaPhiM((*vxcItr)->trackParticle(1)->pt(),
524  (*vxcItr)->trackParticle(1)->eta(),
525  (*vxcItr)->trackParticle(1)->phi(), m_vtx0Daug2MassHypo);
526  double mass_Jpsi = (p4Mup_in + p4Mum_in).M();
527  ATH_MSG_DEBUG("Jpsi mass " << mass_Jpsi);
528  if (mass_Jpsi < m_jpsiMassLower || mass_Jpsi > m_jpsiMassUpper) {
529  ATH_MSG_DEBUG(" Original Jpsi candidate rejected by the mass cut: mass = "
530  << mass_Jpsi << " != (" << m_jpsiMassLower << ", " << m_jpsiMassUpper << ")" );
531  continue;
532  }
533 
534  // Check J/psi pi+ candidate invariant mass and skip if need be
535  double mass_Jpsipi = m_V0Tools->invariantMass(*vxcItr, massesJpsipi);
536  ATH_MSG_DEBUG("Jpsipi mass " << mass_Jpsipi);
537  if (mass_Jpsipi < m_jpsipiMassLower || mass_Jpsipi > m_jpsipiMassUpper) {
538  ATH_MSG_DEBUG(" Original Jpsipi candidate rejected by the mass cut: mass = "
539  << mass_Jpsipi << " != (" << m_jpsipiMassLower << ", " << m_jpsipiMassUpper << ")" );
540  continue;
541  }
542 
543  selectedJpsipiCandidates.push_back(*vxcItr);
544  }
545  if(selectedJpsipiCandidates.size()<1) return StatusCode::SUCCESS;
546 
547  // Select the D0/D0b candidates before calling cascade fit
548  std::vector<const xAOD::Vertex*> selectedD0Candidates;
549  for(auto vxcItr=d0Container->cbegin(); vxcItr!=d0Container->cend(); ++vxcItr) {
550 
551  // Check the passed flag first
552  const xAOD::Vertex* vtx = *vxcItr;
553  SG::AuxElement::Accessor<Char_t> flagAcc1("passed_D0");
554  SG::AuxElement::Accessor<Char_t> flagAcc2("passed_D0b");
555  bool isD0(true);
556  bool isD0b(true);
557  if(flagAcc1.isAvailable(*vtx)){
558  if(!flagAcc1(*vtx)) isD0 = false;
559  }
560  if(flagAcc2.isAvailable(*vtx)){
561  if(!flagAcc2(*vtx)) isD0b = false;
562  }
563  if(!(isD0||isD0b)) continue;
564 
565  // Ensure the total charge is correct
566  if ((*vxcItr)->trackParticle(0)->charge() != 1 || (*vxcItr)->trackParticle(1)->charge() != -1) {
567  ATH_MSG_DEBUG(" Original D0/D0-bar candidate rejected by the charge requirement: "
568  << (*vxcItr)->trackParticle(0)->charge() << ", " << (*vxcItr)->trackParticle(1)->charge() );
569  continue;
570  }
571 
572  // Check D0/D0bar candidate invariant mass and skip if need be
573  double mass_D0 = m_V0Tools->invariantMass(*vxcItr,massesD0);
574  double mass_D0b = m_V0Tools->invariantMass(*vxcItr,massesD0b);
575  ATH_MSG_DEBUG("D0 mass " << mass_D0 << ", D0b mass "<<mass_D0b);
576  if ((mass_D0 < m_D0MassLower || mass_D0 > m_D0MassUpper) && (mass_D0b < m_D0MassLower || mass_D0b > m_D0MassUpper)) {
577  ATH_MSG_DEBUG(" Original D0 candidate rejected by the mass cut: mass = "
578  << mass_D0 << " != (" << m_D0MassLower << ", " << m_D0MassUpper << ") "
579  << mass_D0b << " != (" << m_D0MassLower << ", " << m_D0MassUpper << ") " );
580  continue;
581  }
582 
583  selectedD0Candidates.push_back(*vxcItr);
584  }
585  if(selectedD0Candidates.size()<1) return StatusCode::SUCCESS;
586 
587  // Select J/psi D*+ candidates
588  // Iterate over Jpsi+pi vertices
589  for(auto jpsipiItr=selectedJpsipiCandidates.cbegin(); jpsipiItr!=selectedJpsipiCandidates.cend(); ++jpsipiItr) {
590 
591  size_t jpsipiTrkNum = (*jpsipiItr)->nTrackParticles();
592  tracksJpsipi.clear();
593  tracksJpsi.clear();
594  for( unsigned int it=0; it<jpsipiTrkNum; it++) tracksJpsipi.push_back((*jpsipiItr)->trackParticle(it));
595  for( unsigned int it=0; it<jpsipiTrkNum-1; it++) tracksJpsi.push_back((*jpsipiItr)->trackParticle(it));
596 
597  if (tracksJpsipi.size() != 3 || massesJpsipi.size() != 3 ) {
598  ATH_MSG_INFO("problems with Jpsi+pi input");
599  }
600 
601  bool tagD0(true);
602  if(abs(m_Dx_pid)==421 && (*jpsipiItr)->trackParticle(2)->charge()==-1) tagD0 = false;
603 
604  TLorentzVector p4_pi1; // Momentum of soft pion
605  p4_pi1.SetPtEtaPhiM((*jpsipiItr)->trackParticle(2)->pt(),
606  (*jpsipiItr)->trackParticle(2)->eta(),
607  (*jpsipiItr)->trackParticle(2)->phi(), m_vtx0Daug3MassHypo);
608 
609  // Iterate over D0/D0bar vertices
610  for(auto d0Itr=selectedD0Candidates.cbegin(); d0Itr!=selectedD0Candidates.cend(); ++d0Itr) {
611 
612  // Check identical tracks in input
613  if(std::find(tracksJpsipi.cbegin(), tracksJpsipi.cend(), (*d0Itr)->trackParticle(0)) != tracksJpsipi.cend()) continue;
614  if(std::find(tracksJpsipi.cbegin(), tracksJpsipi.cend(), (*d0Itr)->trackParticle(1)) != tracksJpsipi.cend()) continue;
615 
616 
617  TLorentzVector p4_ka, p4_pi2;
618  if(tagD0){ // for D*+
619  p4_pi2.SetPtEtaPhiM((*d0Itr)->trackParticle(0)->pt(),
620  (*d0Itr)->trackParticle(0)->eta(),
621  (*d0Itr)->trackParticle(0)->phi(), m_vtx1Daug1MassHypo);
622  p4_ka.SetPtEtaPhiM( (*d0Itr)->trackParticle(1)->pt(),
623  (*d0Itr)->trackParticle(1)->eta(),
624  (*d0Itr)->trackParticle(1)->phi(), m_vtx1Daug2MassHypo);
625  }else{ // change the order in the case of D*-
626  p4_pi2.SetPtEtaPhiM((*d0Itr)->trackParticle(1)->pt(),
627  (*d0Itr)->trackParticle(1)->eta(),
628  (*d0Itr)->trackParticle(1)->phi(), m_vtx1Daug1MassHypo);
629  p4_ka.SetPtEtaPhiM( (*d0Itr)->trackParticle(0)->pt(),
630  (*d0Itr)->trackParticle(0)->eta(),
631  (*d0Itr)->trackParticle(0)->phi(), m_vtx1Daug2MassHypo);
632  }
633  // Check D*+/- candidate invariant mass and skip if need be
634  double mass_Dst= (p4_pi1 + p4_ka + p4_pi2).M();
635  ATH_MSG_DEBUG("D*+/- mass " << mass_Dst);
636  if (mass_Dst < m_DstMassLower || mass_Dst > m_DstMassUpper) {
637  ATH_MSG_DEBUG(" Original D*+/- candidate rejected by the mass cut: mass = "
638  << mass_Dst << " != (" << m_DstMassLower << ", " << m_DstMassUpper << ")" );
639  continue;
640  }
641 
642  size_t d0TrkNum = (*d0Itr)->nTrackParticles();
643  tracksD0.clear();
644  for( unsigned int it=0; it<d0TrkNum; it++) tracksD0.push_back((*d0Itr)->trackParticle(it));
645  if (tracksD0.size() != 2 || massesD0.size() != 2 ) {
646  ATH_MSG_INFO("problems with D0 input");
647  }
648 
649  ATH_MSG_DEBUG("using tracks" << tracksJpsipi[0] << ", " << tracksJpsipi[1] << ", " << tracksJpsipi[2] << ", " << tracksD0[0] << ", " << tracksD0[1]);
650  ATH_MSG_DEBUG("Charge of Jpsi+pi tracks: "<<(*jpsipiItr)->trackParticle(0)->charge()<<", "<<(*jpsipiItr)->trackParticle(1)->charge()<<", "<<(*jpsipiItr)->trackParticle(2)->charge());
651  ATH_MSG_DEBUG("Charge of D0 tracks: "<<(*d0Itr)->trackParticle(0)->charge()<<", "<<(*d0Itr)->trackParticle(1)->charge());
652 
653  tracksBc.clear();
654  for( unsigned int it=0; it<jpsipiTrkNum; it++) tracksBc.push_back((*jpsipiItr)->trackParticle(it));
655  for( unsigned int it=0; it<d0TrkNum; it++) tracksBc.push_back((*d0Itr)->trackParticle(it));
656 
657 
658  // Apply the user's settings to the fitter
659  // Reset
660  std::unique_ptr<Trk::IVKalState> state (m_iVertexFitter->makeState());
661  // Robustness
662  int robustness = 0;
663  m_iVertexFitter->setRobustness(robustness, *state);
664  // Build up the topology
665  // Vertex list
666  std::vector<Trk::VertexID> vrtList;
667  // D0 vertex
668  Trk::VertexID vID;
669  if (m_constrD0) {
670  if(tagD0) vID = m_iVertexFitter->startVertex(tracksD0,massesD0,*state,mass_d0);
671  else vID = m_iVertexFitter->startVertex(tracksD0,massesD0b,*state,mass_d0);
672  } else {
673  if(tagD0) vID = m_iVertexFitter->startVertex(tracksD0,massesD0,*state);
674  else vID = m_iVertexFitter->startVertex(tracksD0,massesD0b,*state);
675  }
676  vrtList.push_back(vID);
677  // B vertex including Jpsi+pi
678  Trk::VertexID vID2 = m_iVertexFitter->nextVertex(tracksJpsipi,massesJpsipi,vrtList,*state);
679  if (m_constrJpsi) {
680  std::vector<Trk::VertexID> cnstV;
681  cnstV.clear();
682  if ( !m_iVertexFitter->addMassConstraint(vID2,tracksJpsi,cnstV,*state,m_mass_jpsi).isSuccess() ) {
683  ATH_MSG_WARNING("addMassConstraint failed");
684  //return StatusCode::FAILURE;
685  }
686  }
687  // Do the work
688  std::unique_ptr<Trk::VxCascadeInfo> result(m_iVertexFitter->fitCascade(*state));
689 
690  if (result != nullptr) {
691 
692  // reset links to original tracks
693  BPhysPVCascadeTools::PrepareVertexLinks(result.get(), trackContainer);
694  ATH_MSG_DEBUG("storing tracks " << ((result->vertices())[0])->trackParticle(0) << ", "
695  << ((result->vertices())[0])->trackParticle(1) << ", "
696  << ((result->vertices())[1])->trackParticle(0) << ", "
697  << ((result->vertices())[1])->trackParticle(1) << ", "
698  << ((result->vertices())[1])->trackParticle(2));
699  // necessary to prevent memory leak
700  result->setSVOwnership(true);
701 
702  // Chi2/DOF cut
703  double bChi2DOF = result->fitChi2()/result->nDoF();
704  ATH_MSG_DEBUG("Candidate chi2/DOF is " << bChi2DOF);
705  bool chi2CutPassed = (m_chi2cut <= 0.0 || bChi2DOF < m_chi2cut);
706 
707  const std::vector< std::vector<TLorentzVector> > &moms = result->getParticleMoms();
708  double mass = m_CascadeTools->invariantMass(moms[1]);
709  if(chi2CutPassed) {
710  if (mass >= m_MassLower && mass <= m_MassUpper) {
711  cascadeinfoContainer->push_back(result.release());
712  } else {
713  ATH_MSG_DEBUG("Candidate rejected by the mass cut: mass = "
714  << mass << " != (" << m_MassLower << ", " << m_MassUpper << ")" );
715  }
716  }
717  }
718 
719  } //Iterate over D0 vertices
720 
721  } //Iterate over Jpsi+pi vertices
722 
723  ATH_MSG_DEBUG("cascadeinfoContainer size " << cascadeinfoContainer->size());
724 
725  return StatusCode::SUCCESS;
726  }
727 
728 }
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DerivationFramework::JpsiPlusDpstCascade::JpsiPlusDpstCascade
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Definition: JpsiPlusDpstCascade.cxx:397
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Definition: JpsiPlusDpstCascade.h:60
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Definition: BPhysHypoHelper.cxx:49
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Definition: JpsiPlusDpstCascade.h:63
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The transverse momentum ( ) of the particle.
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Definition: JpsiPlusDpstCascade.h:90
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Definition: JpsiPlusDpstCascade.h:87
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Definition: get_generator_info.py:21
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Temporary container used until we have I/O for AuxStoreInternal.
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Definition: VxCascadeInfo.h:75
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Definition: Sherpa_i/share/common/Base_Fragment.py:59
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Helper class to provide type-safe access to aux data.
Definition: Control/AthContainers/AthContainers/Accessor.h:68
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Returns the charge.
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The pseudorapidity ( ) of the particle.
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Definition: read_hist_ntuple.py:5
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Definition of the current "Vertex container version".
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Definition: JpsiPlusDpstCascade.h:51
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Definition: AthCommonDataStore.h:85
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Definition: BPhysHypoHelper.h:73
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Helper class to provide type-safe access to aux data.
Definition: Decorator.h:59
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VertexAuxContainer_v1 VertexAuxContainer
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Definition: VertexAuxContainer.h:19
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Definition: lumiFormat.py:85
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Definition: beamspotman.py:731
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StatusCode definition for legacy code.
Definition: PhysicsAnalysis/D3PDTools/EventLoop/EventLoop/StatusCode.h:22
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Definition: AthMsgStreamMacros.h:29
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: B-physcis xAOD helpers.
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Definition: JpsiPlusDpstCascade.h:54
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Definition: BPhysPVCascadeTools.cxx:204
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Definition: JpsiPlusDpstCascade.h:56
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Definition: AthCheckMacros.h:40
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Definition: JpsiPlusDpstCascade.h:73
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Get the pointer to a given track that was used in vertex reco.
Definition: Vertex_v1.cxx:249
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Definition: BPhysAddMuonBasedInvMass.h:32
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Returns the z position.
DerivationFramework
THE reconstruction tool.
Definition: ParticleSortingAlg.h:24
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Definition: AthToolSupport/AsgDataHandles/Root/VarHandleKey.cxx:103
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Definition: JpsiPlusDpstCascade.h:66
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Definition: JpsiPlusDpstCascade.h:68
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ElementLink< xAOD::VertexContainer > VertexLink
Definition: Cascade3Plus1.cxx:23
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Derived DataVector<T>.
Definition: DataVector.h:581
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DerivationFramework::JpsiPlusDpstCascade::m_partPropSvc
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Definition: JpsiPlusDpstCascade.h:83
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Definition: JpsiPlusDpstCascade.h:78
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Definition: JpsiPlusDpstCascade.h:85
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Definition: JpsiPlusDpstCascade.h:49
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Definition: BPhysPVCascadeTools.h:34
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StatusCode performSearch(std::vector< Trk::VxCascadeInfo * > *cascadeinfoContainer) const
Definition: JpsiPlusDpstCascade.cxx:469
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Definition: JpsiPlusDpstCascade.h:75
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VxCascadeInfo.h
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mass_b
Definition: mc.PhPy8EG_A14NNPDF23_gg4l_example.py:21
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std::vector< VertexLink > VertexLinkVector
Definition: Cascade3Plus1.cxx:24
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Definition: JpsiPlusDpstCascade.h:53
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Class describing a Vertex.
Definition: Vertex_v1.h:42
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Definition: JpsiPlusDpstCascade.h:72
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#define ATH_MSG_WARNING(x)
Definition: AthMsgStreamMacros.h:32
xAOD::Vertex_v1::y
float y() const
Returns the y position.
DerivationFramework::JpsiPlusDpstCascade::m_vtx1Daug2MassHypo
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Definition: JpsiPlusDpstCascade.h:69
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bool isAvailable(const ELT &e) const
Test to see if this variable exists in the store.
DerivationFramework::JpsiPlusDpstCascade::m_refPVContainerName
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Definition: JpsiPlusDpstCascade.h:86
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Definition: JpsiPlusDpstCascade.h:64
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const_iterator cbegin() const noexcept
Return a const_iterator pointing at the beginning of the collection.
DerivationFramework::JpsiPlusDpstCascade::m_constrD0
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Definition: JpsiPlusDpstCascade.h:74
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Definition: JpsiPlusDpstCascade.h:61
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virtual StatusCode addBranches() const override
Pass the thinning service
Definition: JpsiPlusDpstCascade.cxx:60
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Definition: AthAlgTool.h:26
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size_type size() const noexcept
Returns the number of elements in the collection.
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Definition: JpsiPlusDpstCascade.h:47
DerivationFramework::JpsiPlusDpstCascade::m_D0MassLower
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Definition: JpsiPlusDpstCascade.h:57
HepMCHelpers.h
xAOD::BPhysHypoHelper::setMassErr
bool setMassErr(const float val)
invariant mass error
Definition: BPhysHypoHelper.cxx:54
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Definition: JpsiPlusDpstCascade.h:58
DerivationFramework::JpsiPlusDpstCascade::m_jpsipiMassLower
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Definition: JpsiPlusDpstCascade.h:55
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virtual double phi() const override final
The azimuthal angle ( ) of the particle (has range to .)
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Definition: JpsiPlusDpstCascade.h:82
DerivationFramework::JpsiPlusDpstCascade::m_vtx0Daug1MassHypo
double m_vtx0Daug1MassHypo
Definition: JpsiPlusDpstCascade.h:65
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