ATLAS Offline Software
JpsiPlusDs1Cascade.cxx
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1 /*
2  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
3 */
5 // JpsiPlusDs1Cascade.cxx, (c) ATLAS Detector software
7 #include "DerivationFrameworkBPhys/JpsiPlusDs1Cascade.h"
8 #include "TrkVertexFitterInterfaces/IVertexFitter.h"
9 #include "TrkVKalVrtFitter/TrkVKalVrtFitter.h"
10 #include "TrkVertexAnalysisUtils/V0Tools.h"
11 #include "HepPDT/ParticleDataTable.hh"
12 #include "DerivationFrameworkBPhys/CascadeTools.h"
13 #include "DerivationFrameworkBPhys/BPhysPVCascadeTools.h"
14 #include "xAODTracking/VertexAuxContainer.h"
15 #include "xAODBPhys/BPhysHypoHelper.h"
16 #include <algorithm>
17 #include "xAODTracking/VertexContainer.h"
18 
19 #include "TrkVKalVrtFitter/VxCascadeInfo.h"
20 #include "TruthUtils/HepMCHelpers.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  double JpsiPlusDs1Cascade::getParticleMass(int pdgcode) const{
28  auto ptr = m_particleDataTable->particle( pdgcode );
29  return ptr ? ptr->mass() : 0.;
30  }
31 
32  StatusCode JpsiPlusDs1Cascade::initialize() {
33 
34  // retrieving vertex Fitter
35  ATH_CHECK( m_iVertexFitter.retrieve());
36 
37  // retrieving the V0 tools
38  ATH_CHECK( m_V0Tools.retrieve());
39 
40  // retrieving the Cascade tools
41  ATH_CHECK( m_CascadeTools.retrieve());
42 
43  // Get the beam spot service
44  ATH_CHECK(m_eventInfo_key.initialize());
45 
46  ATH_CHECK( m_partPropSvc.retrieve() );
47  m_particleDataTable = m_partPropSvc->PDT();
48 
49  // retrieve particle masses
50  if(m_mass_jpsi < 0. ) m_mass_jpsi = getParticleMass(MC::JPSI);
51  if(m_vtx0MassHypo < 0.) m_vtx0MassHypo = getParticleMass(MC::BCPLUS);
52  if(m_vtx1MassHypo < 0.) m_vtx1MassHypo = getParticleMass(MC::D0);
53  if(m_vtx2MassHypo < 0.) m_vtx2MassHypo = getParticleMass(MC::K0S);
54 
55  if(m_vtx0Daug1MassHypo < 0.) m_vtx0Daug1MassHypo = getParticleMass(MC::MUON);
56  if(m_vtx0Daug2MassHypo < 0.) m_vtx0Daug2MassHypo = getParticleMass(MC::MUON);
57  if(m_vtx0Daug3MassHypo < 0.) m_vtx0Daug3MassHypo = getParticleMass(MC::PIPLUS);
58  if(m_vtx1Daug1MassHypo < 0.) m_vtx1Daug1MassHypo = getParticleMass(MC::PIPLUS);
59  if(m_vtx1Daug2MassHypo < 0.) m_vtx1Daug2MassHypo = getParticleMass(MC::KPLUS);
60  if(m_vtx2Daug1MassHypo < 0.) m_vtx2Daug1MassHypo = getParticleMass(MC::PIPLUS);
61  if(m_vtx2Daug2MassHypo < 0.) m_vtx2Daug2MassHypo = getParticleMass(MC::PIPLUS);
62 
63  return StatusCode::SUCCESS;
64  }
65 
66 
67  StatusCode JpsiPlusDs1Cascade::addBranches() const
68  {
69  std::vector<Trk::VxCascadeInfo*> cascadeinfoContainer;
70  constexpr int topoN = 3;
71  std::array<xAOD::VertexContainer*, topoN> Vtxwritehandles;
72  std::array<xAOD::VertexAuxContainer*, topoN> Vtxwritehandlesaux;
73  if(m_cascadeOutputsKeys.size() !=topoN) { ATH_MSG_FATAL("Incorrect number of VtxContainers"); return StatusCode::FAILURE; }
74 
75  for(int i =0; i<topoN;i++){
76  Vtxwritehandles[i] = new xAOD::VertexContainer();
77  Vtxwritehandlesaux[i] = new xAOD::VertexAuxContainer();
78  Vtxwritehandles[i]->setStore(Vtxwritehandlesaux[i]);
79  ATH_CHECK(evtStore()->record(Vtxwritehandles[i] , m_cascadeOutputsKeys[i] ));
80  ATH_CHECK(evtStore()->record(Vtxwritehandlesaux[i], m_cascadeOutputsKeys[i] + "Aux."));
81  }
82 
83  //----------------------------------------------------
84  // retrieve primary vertices
85  //----------------------------------------------------
86  const xAOD::Vertex * primaryVertex(nullptr);
87  const xAOD::VertexContainer *pvContainer(nullptr);
88  ATH_CHECK(evtStore()->retrieve(pvContainer, m_VxPrimaryCandidateName));
89  ATH_MSG_DEBUG("Found " << m_VxPrimaryCandidateName << " in StoreGate!");
90 
91  if (pvContainer->size()==0){
92  ATH_MSG_WARNING("You have no primary vertices: " << pvContainer->size());
93  return StatusCode::RECOVERABLE;
94  } else {
95  primaryVertex = (*pvContainer)[0];
96  }
97 
98  //----------------------------------------------------
99  // Try to retrieve refitted primary vertices
100  //----------------------------------------------------
101  xAOD::VertexContainer* refPvContainer = nullptr;
102  xAOD::VertexAuxContainer* refPvAuxContainer = nullptr;
103  if (m_refitPV) {
104  if (evtStore()->contains<xAOD::VertexContainer>(m_refPVContainerName)) {
105  // refitted PV container exists. Get it from the store gate
106  ATH_CHECK(evtStore()->retrieve(refPvContainer , m_refPVContainerName ));
107  ATH_CHECK(evtStore()->retrieve(refPvAuxContainer, m_refPVContainerName + "Aux."));
108  } else {
109  // refitted PV container does not exist. Create a new one.
110  refPvContainer = new xAOD::VertexContainer;
111  refPvAuxContainer = new xAOD::VertexAuxContainer;
112  refPvContainer->setStore(refPvAuxContainer);
113  ATH_CHECK(evtStore()->record(refPvContainer , m_refPVContainerName));
114  ATH_CHECK(evtStore()->record(refPvAuxContainer, m_refPVContainerName+"Aux."));
115  }
116  }
117 
118  ATH_CHECK(performSearch(&cascadeinfoContainer));
119 
120  SG::ReadHandle<xAOD::EventInfo> evt(m_eventInfo_key);
121  if(not evt.isValid()) ATH_MSG_ERROR("Cannot Retrieve " << m_eventInfo_key.key() );
122  BPhysPVCascadeTools helper(&(*m_CascadeTools), evt.cptr());
123  helper.SetMinNTracksInPV(m_PV_minNTracks);
124 
125  // Decorators for the main vertex: chi2, ndf, pt and pt error, plus the D0, K0 vertex variables
126  SG::AuxElement::Decorator<VertexLinkVector> CascadeV1LinksDecor("CascadeVertex1Links");
127  SG::AuxElement::Decorator<VertexLinkVector> CascadeV2LinksDecor("CascadeVertex2Links");
128  SG::AuxElement::Decorator<VertexLinkVector> JpsipiLinksDecor("JpsipiVertexLinks");
129  SG::AuxElement::Decorator<VertexLinkVector> D0LinksDecor("D0VertexLinks");
130  SG::AuxElement::Decorator<VertexLinkVector> K0LinksDecor("K0VertexLinks");
131  SG::AuxElement::Decorator<float> chi2_decor("ChiSquared");
132  SG::AuxElement::Decorator<float> ndof_decor("NumberDoF");
133  SG::AuxElement::Decorator<float> Pt_decor("Pt");
134  SG::AuxElement::Decorator<float> PtErr_decor("PtErr");
135  SG::AuxElement::Decorator<float> Mass_svdecor("D0_mass");
136  SG::AuxElement::Decorator<float> MassErr_svdecor("D0_massErr");
137  SG::AuxElement::Decorator<float> Pt_svdecor("D0_Pt");
138  SG::AuxElement::Decorator<float> PtErr_svdecor("D0_PtErr");
139  SG::AuxElement::Decorator<float> Lxy_svdecor("D0_Lxy");
140  SG::AuxElement::Decorator<float> LxyErr_svdecor("D0_LxyErr");
141  SG::AuxElement::Decorator<float> Tau_svdecor("D0_Tau");
142  SG::AuxElement::Decorator<float> TauErr_svdecor("D0_TauErr");
143 
144  SG::AuxElement::Decorator<float> Mass_sv2decor("K0_mass");
145  SG::AuxElement::Decorator<float> MassErr_sv2decor("K0_massErr");
146  SG::AuxElement::Decorator<float> Pt_sv2decor("K0_Pt");
147  SG::AuxElement::Decorator<float> PtErr_sv2decor("K0_PtErr");
148  SG::AuxElement::Decorator<float> Lxy_sv2decor("K0_Lxy");
149  SG::AuxElement::Decorator<float> LxyErr_sv2decor("K0_LxyErr");
150  SG::AuxElement::Decorator<float> Tau_sv2decor("K0_Tau");
151  SG::AuxElement::Decorator<float> TauErr_sv2decor("K0_TauErr");
152 
153  SG::AuxElement::Decorator<float> MassJpsi_decor("Jpsi_mass");
154  SG::AuxElement::Decorator<float> MassPiD0_decor("PiD0_mass");
155  SG::AuxElement::Decorator<float> MassPiD0K0_decor("PiD0K0_mass");
156 
157  SG::AuxElement::Decorator<float> MassMumu_decor("Mumu_mass");
158  SG::AuxElement::Decorator<float> MassKpi_svdecor("Kpi_mass");
159  SG::AuxElement::Decorator<float> MassPipi_sv2decor("Pipi_mass");
160 
161  ATH_MSG_DEBUG("cascadeinfoContainer size " << cascadeinfoContainer.size());
162 
163  // Get Jpsi+pi container and identify the input Jpsi+pi
164  const xAOD::VertexContainer *jpsipiContainer(nullptr);
165  ATH_CHECK(evtStore()->retrieve(jpsipiContainer , m_vertexContainerKey ));
166  // Get D0 container and identify the input D0
167  const xAOD::VertexContainer *d0Container(nullptr);
168  ATH_CHECK(evtStore()->retrieve(d0Container , m_vertexD0ContainerKey ));
169  // Get K0 container and identify the input K0
170  const xAOD::VertexContainer *k0Container(nullptr);
171  ATH_CHECK(evtStore()->retrieve(k0Container , m_vertexK0ContainerKey ));
172 
173  for (Trk::VxCascadeInfo* x : cascadeinfoContainer) {
174  if(x==nullptr) {
175  ATH_MSG_ERROR("cascadeinfoContainer is null");
176  //x is dereferenced if we pass this
177  return StatusCode::FAILURE;
178  }
179 
180  // the cascade fitter returns:
181  // std::vector<xAOD::Vertex*>, each xAOD::Vertex contains the refitted track parameters (perigee at the vertex position)
182  // vertices[iv] the links to the original TPs and a covariance of size 3+5*NTRK; the chi2 of the total fit
183  // is split between the cascade vertices as per track contribution
184  // std::vector< std::vector<TLorentzVector> >, each std::vector<TLorentzVector> contains the refitted momenta (TLorentzVector)
185  // momenta[iv][...] of all tracks in the corresponding vertex, including any pseudotracks (from cascade vertices)
186  // originating in this vertex; the masses are as assigned in the cascade fit
187  // std::vector<Amg::MatrixX>, the corresponding covariance matrices in momentum space
188  // covariance[iv]
189  // int nDoF, double Chi2
190  //
191  // the invariant mass, pt, lifetime etc. errors should be calculated using the covariance matrices in momentum space as these
192  // take into account the full track-track and track-vertex correlations
193  //
194  // 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.
195  // The covariance terms between the two vertices are not stored. In momentum space momenta[0] contains the 2 V0 tracks,
196  // their momenta add up to the momentum of the 3rd track in momenta[1], the first two being the Jpsi tracks
197 
198  const std::vector<xAOD::Vertex*> &cascadeVertices = x->vertices();
199  if(cascadeVertices.size()!=topoN)
200  ATH_MSG_ERROR("Incorrect number of vertices");
201  if(cascadeVertices[0] == nullptr || cascadeVertices[1] == nullptr || cascadeVertices[2] == nullptr) ATH_MSG_ERROR("Error null vertex");
202  // Keep vertices (bear in mind that they come in reverse order!)
203  for(int i =0;i<topoN;i++) Vtxwritehandles[i]->push_back(cascadeVertices[i]);
204 
205  x->setSVOwnership(false); // Prevent Container from deleting vertices
206  const auto mainVertex = cascadeVertices[2]; // this is the B_c+/- vertex
207  const std::vector< std::vector<TLorentzVector> > &moms = x->getParticleMoms();
208 
209  // Set links to cascade vertices
210  std::vector<const xAOD::Vertex*> verticestoLink;
211  verticestoLink.push_back(cascadeVertices[0]);
212  //if(Vtxwritehandles[1] == nullptr) ATH_MSG_ERROR("Vtxwritehandles[1] is null");
213  if(Vtxwritehandles[2] == nullptr) ATH_MSG_ERROR("Vtxwritehandles[2] is null");
214  if(!BPhysPVCascadeTools::LinkVertices(CascadeV1LinksDecor, verticestoLink, Vtxwritehandles[0], cascadeVertices[2]))
215  ATH_MSG_ERROR("Error decorating with cascade vertices");
216 
217  verticestoLink.clear();
218  verticestoLink.push_back(cascadeVertices[1]);
219  if(!BPhysPVCascadeTools::LinkVertices(CascadeV2LinksDecor, verticestoLink, Vtxwritehandles[1], cascadeVertices[2]))
220  ATH_MSG_ERROR("Error decorating with cascade vertices");
221 
222  // Identify the input Jpsi+pi
223  const xAOD::Vertex* jpsipiVertex = BPhysPVCascadeTools::FindVertex<3>(jpsipiContainer, cascadeVertices[2]);
224  ATH_MSG_DEBUG("1 pt Jpsi+pi tracks " << cascadeVertices[2]->trackParticle(0)->pt() << ", " << cascadeVertices[2]->trackParticle(1)->pt() << ", " << cascadeVertices[2]->trackParticle(2)->pt());
225  if (jpsipiVertex) ATH_MSG_DEBUG("2 pt Jpsi+pi tracks " << jpsipiVertex->trackParticle(0)->pt() << ", " << jpsipiVertex->trackParticle(1)->pt() << ", " << jpsipiVertex->trackParticle(2)->pt());
226 
227  // Identify the input D0
228  const xAOD::Vertex* d0Vertex = BPhysPVCascadeTools::FindVertex<2>(d0Container, cascadeVertices[1]);;
229  ATH_MSG_DEBUG("1 pt D0 tracks " << cascadeVertices[1]->trackParticle(0)->pt() << ", " << cascadeVertices[1]->trackParticle(1)->pt());
230  if (d0Vertex) ATH_MSG_DEBUG("2 pt D0 tracks " << d0Vertex->trackParticle(0)->pt() << ", " << d0Vertex->trackParticle(1)->pt());
231 
232  // Identify the input K_S0
233  const xAOD::Vertex* k0Vertex = BPhysPVCascadeTools::FindVertex<2>(k0Container, cascadeVertices[0]);;
234  ATH_MSG_DEBUG("1 pt K_S0 tracks " << cascadeVertices[0]->trackParticle(0)->pt() << ", " << cascadeVertices[0]->trackParticle(1)->pt());
235  if (k0Vertex) ATH_MSG_DEBUG("2 pt K_S0 tracks " << k0Vertex->trackParticle(0)->pt() << ", " << k0Vertex->trackParticle(1)->pt());
236 
237  // Set links to input vertices
238  std::vector<const xAOD::Vertex*> jpsipiVerticestoLink;
239  if (jpsipiVertex) jpsipiVerticestoLink.push_back(jpsipiVertex);
240  else ATH_MSG_WARNING("Could not find linking Jpsi+pi");
241  if(!BPhysPVCascadeTools::LinkVertices(JpsipiLinksDecor, jpsipiVerticestoLink, jpsipiContainer, cascadeVertices[2]))
242  ATH_MSG_ERROR("Error decorating with Jpsi+pi vertices");
243 
244  std::vector<const xAOD::Vertex*> d0VerticestoLink;
245  if (d0Vertex) d0VerticestoLink.push_back(d0Vertex);
246  else ATH_MSG_WARNING("Could not find linking D0");
247  if(!BPhysPVCascadeTools::LinkVertices(D0LinksDecor, d0VerticestoLink, d0Container, cascadeVertices[2]))
248  ATH_MSG_ERROR("Error decorating with D0 vertices");
249 
250  std::vector<const xAOD::Vertex*> k0VerticestoLink;
251  if (k0Vertex) k0VerticestoLink.push_back(k0Vertex);
252  else ATH_MSG_WARNING("Could not find linking K_S0");
253  if(!BPhysPVCascadeTools::LinkVertices(K0LinksDecor, k0VerticestoLink, k0Container, cascadeVertices[2]))
254  ATH_MSG_ERROR("Error decorating with K_S0 vertices");
255 
256  bool tagD0(true);
257  if (jpsipiVertex){
258  if(abs(m_Dx_pid)==421 && (jpsipiVertex->trackParticle(2)->charge()==-1)) tagD0 = false;
259  }
260 
261  double mass_b = m_vtx0MassHypo;
262  double mass_d0 = m_vtx1MassHypo;
263  double mass_k0 = m_vtx2MassHypo;
264  std::vector<double> massesJpsipi;
265  massesJpsipi.push_back(m_vtx0Daug1MassHypo);
266  massesJpsipi.push_back(m_vtx0Daug2MassHypo);
267  massesJpsipi.push_back(m_vtx0Daug3MassHypo);
268  std::vector<double> massesD0;
269  if(tagD0){
270  massesD0.push_back(m_vtx1Daug1MassHypo);
271  massesD0.push_back(m_vtx1Daug2MassHypo);
272  }else{ // Change the oreder of masses for D*-->D0bar pi-, D0bar->K+pi-
273  massesD0.push_back(m_vtx1Daug2MassHypo);
274  massesD0.push_back(m_vtx1Daug1MassHypo);
275  }
276  std::vector<double> massesK0;
277  massesK0.push_back(m_vtx2Daug1MassHypo);
278  massesK0.push_back(m_vtx2Daug2MassHypo);
279  std::vector<double> Masses;
280  Masses.push_back(m_vtx0Daug1MassHypo);
281  Masses.push_back(m_vtx0Daug2MassHypo);
282  Masses.push_back(m_vtx0Daug3MassHypo);
283  Masses.push_back(m_vtx1MassHypo);
284  Masses.push_back(m_vtx2MassHypo);
285 
286  // loop over candidates -- Don't apply PV_minNTracks requirement here
287  // because it may result in exclusion of the high-pt PV.
288  // get good PVs
289 
290  xAOD::BPhysHypoHelper vtx(m_hypoName, mainVertex);
291 
292  BPhysPVCascadeTools::SetVectorInfo(vtx, x);
293 
294  // Decorate main vertex
295  //
296  // 1.a) mass, mass error
297  BPHYS_CHECK( vtx.setMass(m_CascadeTools->invariantMass(moms[2])) );
298  BPHYS_CHECK( vtx.setMassErr(m_CascadeTools->invariantMassError(moms[2],x->getCovariance()[2])) );
299  // 1.b) pt and pT error (the default pt of mainVertex is != the pt of the full cascade fit!)
300  Pt_decor(*mainVertex) = m_CascadeTools->pT(moms[2]);
301  PtErr_decor(*mainVertex) = m_CascadeTools->pTError(moms[2],x->getCovariance()[2]);
302  // 1.c) chi2 and ndof (the default chi2 of mainVertex is != the chi2 of the full cascade fit!)
303  chi2_decor(*mainVertex) = x->fitChi2();
304  ndof_decor(*mainVertex) = x->nDoF();
305 
306  float massMumu = 0.;
307  if (jpsipiVertex) {
308  TLorentzVector p4_mu1, p4_mu2;
309  p4_mu1.SetPtEtaPhiM(jpsipiVertex->trackParticle(0)->pt(),
310  jpsipiVertex->trackParticle(0)->eta(),
311  jpsipiVertex->trackParticle(0)->phi(), m_vtx0Daug1MassHypo);
312  p4_mu2.SetPtEtaPhiM(jpsipiVertex->trackParticle(1)->pt(),
313  jpsipiVertex->trackParticle(1)->eta(),
314  jpsipiVertex->trackParticle(1)->phi(), m_vtx0Daug2MassHypo);
315  massMumu = (p4_mu1 + p4_mu2).M();
316  }
317  MassMumu_decor(*mainVertex) = massMumu;
318 
319  float massKpi = 0.;
320  if (d0Vertex) {
321  TLorentzVector p4_ka, p4_pi;
322  if(tagD0){
323  p4_pi.SetPtEtaPhiM(d0Vertex->trackParticle(0)->pt(),
324  d0Vertex->trackParticle(0)->eta(),
325  d0Vertex->trackParticle(0)->phi(), m_vtx1Daug1MassHypo);
326  p4_ka.SetPtEtaPhiM(d0Vertex->trackParticle(1)->pt(),
327  d0Vertex->trackParticle(1)->eta(),
328  d0Vertex->trackParticle(1)->phi(), m_vtx1Daug2MassHypo);
329  }else{ // Change the oreder of masses for D*-->D0bar pi-, D0bar->K+pi-
330  p4_pi.SetPtEtaPhiM(d0Vertex->trackParticle(1)->pt(),
331  d0Vertex->trackParticle(1)->eta(),
332  d0Vertex->trackParticle(1)->phi(), m_vtx1Daug1MassHypo);
333  p4_ka.SetPtEtaPhiM(d0Vertex->trackParticle(0)->pt(),
334  d0Vertex->trackParticle(0)->eta(),
335  d0Vertex->trackParticle(0)->phi(), m_vtx1Daug2MassHypo);
336  }
337  massKpi = (p4_ka + p4_pi).M();
338  }
339  MassKpi_svdecor(*mainVertex) = massKpi;
340 
341  float massPipi = 0.;
342  if (k0Vertex) {
343  TLorentzVector p4_pip, p4_pim;
344  p4_pip.SetPtEtaPhiM(k0Vertex->trackParticle(0)->pt(),
345  k0Vertex->trackParticle(0)->eta(),
346  k0Vertex->trackParticle(0)->phi(), m_vtx2Daug1MassHypo);
347  p4_pim.SetPtEtaPhiM(k0Vertex->trackParticle(1)->pt(),
348  k0Vertex->trackParticle(1)->eta(),
349  k0Vertex->trackParticle(1)->phi(), m_vtx2Daug2MassHypo);
350  massPipi = (p4_pip + p4_pim).M();
351  }
352  MassPipi_sv2decor(*mainVertex) = massPipi;
353 
354  MassJpsi_decor(*mainVertex) = (moms[2][0] + moms[2][1]).M();
355  MassPiD0_decor(*mainVertex) = (moms[2][2] + moms[2][4]).M();
356  MassPiD0K0_decor(*mainVertex) = (moms[2][2] + moms[2][4] + moms[2][3]).M();
357 
358  ATH_CHECK(helper.FillCandwithRefittedVertices(m_refitPV, pvContainer,
359  refPvContainer, &(*m_pvRefitter), m_PV_max, m_DoVertexType, x, 2, mass_b, vtx));
360 
361  // 4) decorate the main vertex with D0 vertex mass, pt, lifetime and lxy values (plus errors)
362  // D0 points to the main vertex, so lifetime and lxy are w.r.t the main vertex
363  Mass_svdecor(*mainVertex) = m_CascadeTools->invariantMass(moms[1]);
364  MassErr_svdecor(*mainVertex) = m_CascadeTools->invariantMassError(moms[1],x->getCovariance()[1]);
365  Pt_svdecor(*mainVertex) = m_CascadeTools->pT(moms[1]);
366  PtErr_svdecor(*mainVertex) = m_CascadeTools->pTError(moms[1],x->getCovariance()[1]);
367  Lxy_svdecor(*mainVertex) = m_CascadeTools->lxy(moms[1],cascadeVertices[1],cascadeVertices[2]);
368  LxyErr_svdecor(*mainVertex) = m_CascadeTools->lxyError(moms[1],x->getCovariance()[1],cascadeVertices[1],cascadeVertices[2]);
369  Tau_svdecor(*mainVertex) = m_CascadeTools->tau(moms[1],cascadeVertices[1],cascadeVertices[2]);
370  TauErr_svdecor(*mainVertex) = m_CascadeTools->tauError(moms[1],x->getCovariance()[1],cascadeVertices[1],cascadeVertices[2]);
371 
372  // 5) decorate the main vertex with K_S0 vertex mass, pt, lifetime and lxy values (plus errors)
373  // K_S0 points to the main vertex, so lifetime and lxy are w.r.t the main vertex
374  Mass_sv2decor(*mainVertex) = m_CascadeTools->invariantMass(moms[0]);
375  MassErr_sv2decor(*mainVertex) = m_CascadeTools->invariantMassError(moms[0],x->getCovariance()[0]);
376  Pt_sv2decor(*mainVertex) = m_CascadeTools->pT(moms[0]);
377  PtErr_sv2decor(*mainVertex) = m_CascadeTools->pTError(moms[0],x->getCovariance()[0]);
378  Lxy_sv2decor(*mainVertex) = m_CascadeTools->lxy(moms[0],cascadeVertices[0],cascadeVertices[2]);
379  LxyErr_sv2decor(*mainVertex) = m_CascadeTools->lxyError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[2]);
380  Tau_sv2decor(*mainVertex) = m_CascadeTools->tau(moms[0],cascadeVertices[0],cascadeVertices[2]);
381  TauErr_sv2decor(*mainVertex) = m_CascadeTools->tauError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[2]);
382 
383  // Some checks in DEBUG mode
384  ATH_MSG_DEBUG("chi2 " << x->fitChi2()
385  << " chi2_1 " << m_V0Tools->chisq(cascadeVertices[0])
386  << " chi2_2 " << m_V0Tools->chisq(cascadeVertices[1])
387  << " chi2_3 " << m_V0Tools->chisq(cascadeVertices[2])
388  << " vprob " << m_CascadeTools->vertexProbability(x->nDoF(),x->fitChi2()));
389  ATH_MSG_DEBUG("ndf " << x->nDoF() << " ndf_1 " << m_V0Tools->ndof(cascadeVertices[0]) << " ndf_2 " << m_V0Tools->ndof(cascadeVertices[1]) << " ndf_3 " << m_V0Tools->ndof(cascadeVertices[2]));
390  ATH_MSG_DEBUG("V0Tools mass_k0 " << m_V0Tools->invariantMass(cascadeVertices[0],massesK0)
391  << " error " << m_V0Tools->invariantMassError(cascadeVertices[0],massesK0)
392  << " mass_d0 " << m_V0Tools->invariantMass(cascadeVertices[1],massesD0)
393  << " error " << m_V0Tools->invariantMassError(cascadeVertices[1],massesD0)
394  << " mass_J " << m_V0Tools->invariantMass(cascadeVertices[2],massesJpsipi)
395  << " error " << m_V0Tools->invariantMassError(cascadeVertices[2],massesJpsipi));
396  // masses and errors, using track masses assigned in the fit
397  double Mass_B = m_CascadeTools->invariantMass(moms[2]);
398  double Mass_D0 = m_CascadeTools->invariantMass(moms[1]);
399  double Mass_K0 = m_CascadeTools->invariantMass(moms[0]);
400  double Mass_B_err = m_CascadeTools->invariantMassError(moms[2],x->getCovariance()[2]);
401  double Mass_D0_err = m_CascadeTools->invariantMassError(moms[1],x->getCovariance()[1]);
402  double Mass_K0_err = m_CascadeTools->invariantMassError(moms[0],x->getCovariance()[0]);
403  ATH_MSG_DEBUG("Mass_B " << Mass_B << " Mass_D0 " << Mass_D0 << " Mass_K0 " << Mass_K0);
404  ATH_MSG_DEBUG("Mass_B_err " << Mass_B_err << " Mass_D0_err " << Mass_D0_err << " Mass_K0_err " << Mass_K0_err);
405  double mprob_B = m_CascadeTools->massProbability(mass_b,Mass_B,Mass_B_err);
406  double mprob_D0 = m_CascadeTools->massProbability(mass_d0,Mass_D0,Mass_D0_err);
407  double mprob_K0 = m_CascadeTools->massProbability(mass_k0,Mass_K0,Mass_K0_err);
408  ATH_MSG_DEBUG("mprob_B " << mprob_B << " mprob_D0 " << mprob_D0 << " mprob_K0 " << mprob_K0);
409  // masses and errors, assigning user defined track masses
410  ATH_MSG_DEBUG("Mass_b " << m_CascadeTools->invariantMass(moms[2],Masses)
411  << " Mass_d0 " << m_CascadeTools->invariantMass(moms[1],massesD0)
412  << " Mass_k0 " << m_CascadeTools->invariantMass(moms[0],massesD0));
413  ATH_MSG_DEBUG("Mass_b_err " << m_CascadeTools->invariantMassError(moms[2],x->getCovariance()[2],Masses)
414  << " Mass_d0_err " << m_CascadeTools->invariantMassError(moms[1],x->getCovariance()[1],massesD0)
415  << " Mass_k0_err " << m_CascadeTools->invariantMassError(moms[0],x->getCovariance()[0],massesK0));
416  ATH_MSG_DEBUG("pt_b " << m_CascadeTools->pT(moms[2])
417  << " pt_d " << m_CascadeTools->pT(moms[1])
418  << " pt_d0 " << m_V0Tools->pT(cascadeVertices[1])
419  << " pt_k " << m_CascadeTools->pT(moms[0])
420  << " pt_k0 " << m_V0Tools->pT(cascadeVertices[0]));
421  ATH_MSG_DEBUG("ptErr_b " << m_CascadeTools->pTError(moms[2],x->getCovariance()[2])
422  << " ptErr_d " << m_CascadeTools->pTError(moms[1],x->getCovariance()[1])
423  << " ptErr_d0 " << m_V0Tools->pTError(cascadeVertices[1])
424  << " ptErr_k " << m_CascadeTools->pTError(moms[0],x->getCovariance()[0])
425  << " ptErr_k0 " << m_V0Tools->pTError(cascadeVertices[0]));
426  ATH_MSG_DEBUG("lxy_B " << m_V0Tools->lxy(cascadeVertices[2],primaryVertex) << " lxy_D " << m_V0Tools->lxy(cascadeVertices[1],cascadeVertices[2]) << " lxy_K " << m_V0Tools->lxy(cascadeVertices[0],cascadeVertices[2]));
427  ATH_MSG_DEBUG("lxy_b " << m_CascadeTools->lxy(moms[2],cascadeVertices[2],primaryVertex) << " lxy_d " << m_CascadeTools->lxy(moms[1],cascadeVertices[1],cascadeVertices[2]) << " lxy_k " << m_CascadeTools->lxy(moms[0],cascadeVertices[0],cascadeVertices[2]));
428  ATH_MSG_DEBUG("lxyErr_b " << m_CascadeTools->lxyError(moms[2],x->getCovariance()[2],cascadeVertices[2],primaryVertex)
429  << " lxyErr_d " << m_CascadeTools->lxyError(moms[1],x->getCovariance()[1],cascadeVertices[1],cascadeVertices[2])
430  << " lxyErr_d0 " << m_V0Tools->lxyError(cascadeVertices[1],cascadeVertices[2])
431  << " lxyErr_k " << m_CascadeTools->lxyError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[2])
432  << " lxyErr_k0 " << m_V0Tools->lxyError(cascadeVertices[0],cascadeVertices[2]));
433  ATH_MSG_DEBUG("tau_B " << m_CascadeTools->tau(moms[2],cascadeVertices[2],primaryVertex,mass_b)
434  << " tau_d0 " << m_V0Tools->tau(cascadeVertices[1],cascadeVertices[2],massesD0)
435  << " tau_k0 " << m_V0Tools->tau(cascadeVertices[0],cascadeVertices[2],massesK0));
436  ATH_MSG_DEBUG("tau_b " << m_CascadeTools->tau(moms[2],cascadeVertices[2],primaryVertex)
437  << " tau_d " << m_CascadeTools->tau(moms[1],cascadeVertices[1],cascadeVertices[2])
438  << " tau_D " << m_CascadeTools->tau(moms[1],cascadeVertices[1],cascadeVertices[2],mass_d0)
439  << " tau_k " << m_CascadeTools->tau(moms[0],cascadeVertices[0],cascadeVertices[2])
440  << " tau_K " << m_CascadeTools->tau(moms[0],cascadeVertices[0],cascadeVertices[2],mass_k0));
441  ATH_MSG_DEBUG("tauErr_b " << m_CascadeTools->tauError(moms[2],x->getCovariance()[2],cascadeVertices[2],primaryVertex)
442  << " tauErr_d " << m_CascadeTools->tauError(moms[1],x->getCovariance()[1],cascadeVertices[1],cascadeVertices[2])
443  << " tauErr_d0 " << m_V0Tools->tauError(cascadeVertices[1],cascadeVertices[2],massesD0)
444  << " tauErr_k " << m_CascadeTools->tauError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[2])
445  << " tauErr_k0 " << m_V0Tools->tauError(cascadeVertices[0],cascadeVertices[2],massesK0));
446  ATH_MSG_DEBUG("TauErr_b " << m_CascadeTools->tauError(moms[2],x->getCovariance()[2],cascadeVertices[2],primaryVertex,mass_b)
447  << " TauErr_d " << m_CascadeTools->tauError(moms[1],x->getCovariance()[1],cascadeVertices[1],cascadeVertices[2],mass_d0)
448  << " TauErr_d0 " << m_V0Tools->tauError(cascadeVertices[1],cascadeVertices[2],massesD0,mass_d0)
449  << " TauErr_k " << m_CascadeTools->tauError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[2],mass_k0)
450  << " TauErr_k0 " << m_V0Tools->tauError(cascadeVertices[0],cascadeVertices[2],massesD0,mass_k0));
451 
452  ATH_MSG_DEBUG("CascadeTools main vert wrt PV " << " CascadeTools SV " << " V0Tools SV");
453  ATH_MSG_DEBUG("a0z " << m_CascadeTools->a0z(moms[2],cascadeVertices[2],primaryVertex)
454  << ", " << m_CascadeTools->a0z(moms[1],cascadeVertices[1],cascadeVertices[2])
455  << ", " << m_CascadeTools->a0z(moms[0],cascadeVertices[0],cascadeVertices[2])
456  << ", " << m_V0Tools->a0z(cascadeVertices[1],cascadeVertices[2])
457  << ", " << m_V0Tools->a0z(cascadeVertices[0],cascadeVertices[2]));
458  ATH_MSG_DEBUG("a0zErr " << m_CascadeTools->a0zError(moms[2],x->getCovariance()[2],cascadeVertices[2],primaryVertex)
459  << ", " << m_CascadeTools->a0zError(moms[1],x->getCovariance()[1],cascadeVertices[1],cascadeVertices[2])
460  << ", " << m_CascadeTools->a0zError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[2])
461  << ", " << m_V0Tools->a0zError(cascadeVertices[1],cascadeVertices[2])
462  << ", " << m_V0Tools->a0zError(cascadeVertices[0],cascadeVertices[2]));
463  ATH_MSG_DEBUG("a0xy " << m_CascadeTools->a0xy(moms[2],cascadeVertices[2],primaryVertex)
464  << ", " << m_CascadeTools->a0xy(moms[1],cascadeVertices[1],cascadeVertices[2])
465  << ", " << m_CascadeTools->a0xy(moms[0],cascadeVertices[0],cascadeVertices[2])
466  << ", " << m_V0Tools->a0xy(cascadeVertices[1],cascadeVertices[2])
467  << ", " << m_V0Tools->a0xy(cascadeVertices[0],cascadeVertices[2]));
468  ATH_MSG_DEBUG("a0xyErr " << m_CascadeTools->a0xyError(moms[2],x->getCovariance()[2],cascadeVertices[2],primaryVertex)
469  << ", " << m_CascadeTools->a0xyError(moms[1],x->getCovariance()[1],cascadeVertices[1],cascadeVertices[2])
470  << ", " << m_CascadeTools->a0xyError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[2])
471  << ", " << m_V0Tools->a0xyError(cascadeVertices[1],cascadeVertices[2])
472  << ", " << m_V0Tools->a0xyError(cascadeVertices[0],cascadeVertices[2]));
473  ATH_MSG_DEBUG("a0 " << m_CascadeTools->a0(moms[2],cascadeVertices[2],primaryVertex)
474  << ", " << m_CascadeTools->a0(moms[1],cascadeVertices[1],cascadeVertices[2])
475  << ", " << m_CascadeTools->a0(moms[0],cascadeVertices[0],cascadeVertices[2])
476  << ", " << m_V0Tools->a0(cascadeVertices[1],cascadeVertices[2])
477  << ", " << m_V0Tools->a0(cascadeVertices[0],cascadeVertices[2]));
478  ATH_MSG_DEBUG("a0Err " << m_CascadeTools->a0Error(moms[2],x->getCovariance()[2],cascadeVertices[2],primaryVertex)
479  << ", " << m_CascadeTools->a0Error(moms[1],x->getCovariance()[1],cascadeVertices[1],cascadeVertices[2])
480  << ", " << m_CascadeTools->a0Error(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[2])
481  << ", " << m_V0Tools->a0Error(cascadeVertices[1],cascadeVertices[2])
482  << ", " << m_V0Tools->a0Error(cascadeVertices[0],cascadeVertices[2]));
483  ATH_MSG_DEBUG("x0 " << m_V0Tools->vtx(cascadeVertices[0]).x() << " y0 " << m_V0Tools->vtx(cascadeVertices[0]).y() << " z0 " << m_V0Tools->vtx(cascadeVertices[0]).z());
484  ATH_MSG_DEBUG("x1 " << m_V0Tools->vtx(cascadeVertices[1]).x() << " y1 " << m_V0Tools->vtx(cascadeVertices[1]).y() << " z1 " << m_V0Tools->vtx(cascadeVertices[1]).z());
485  ATH_MSG_DEBUG("x2 " << m_V0Tools->vtx(cascadeVertices[2]).x() << " y2 " << m_V0Tools->vtx(cascadeVertices[2]).y() << " z2 " << m_V0Tools->vtx(cascadeVertices[2]).z());
486  ATH_MSG_DEBUG("X0 " << primaryVertex->x() << " Y0 " << primaryVertex->y() << " Z0 " << primaryVertex->z());
487  ATH_MSG_DEBUG("rxy0 " << m_V0Tools->rxy(cascadeVertices[0]) << " rxyErr0 " << m_V0Tools->rxyError(cascadeVertices[0]));
488  ATH_MSG_DEBUG("rxy1 " << m_V0Tools->rxy(cascadeVertices[1]) << " rxyErr1 " << m_V0Tools->rxyError(cascadeVertices[1]));
489  ATH_MSG_DEBUG("rxy2 " << m_V0Tools->rxy(cascadeVertices[2]) << " rxyErr2 " << m_V0Tools->rxyError(cascadeVertices[2]));
490  ATH_MSG_DEBUG("Rxy0 wrt PV " << m_V0Tools->rxy(cascadeVertices[0],primaryVertex) << " RxyErr0 wrt PV " << m_V0Tools->rxyError(cascadeVertices[0],primaryVertex));
491  ATH_MSG_DEBUG("Rxy1 wrt PV " << m_V0Tools->rxy(cascadeVertices[1],primaryVertex) << " RxyErr1 wrt PV " << m_V0Tools->rxyError(cascadeVertices[1],primaryVertex));
492  ATH_MSG_DEBUG("Rxy2 wrt PV " << m_V0Tools->rxy(cascadeVertices[2],primaryVertex) << " RxyErr2 wrt PV " << m_V0Tools->rxyError(cascadeVertices[2],primaryVertex));
493  ATH_MSG_DEBUG("number of covariance matrices " << (x->getCovariance()).size());
494  } // loop over cascadeinfoContainer
495 
496  // Deleting cascadeinfo since this won't be stored.
497  // Vertices have been kept in m_cascadeOutputs and should be owned by their container
498  for (auto x : cascadeinfoContainer) delete x;
499 
500  return StatusCode::SUCCESS;
501  }
502 
503 
504  JpsiPlusDs1Cascade::JpsiPlusDs1Cascade(const std::string& t, const std::string& n, const IInterface* p) : AthAlgTool(t,n,p),
505  m_vertexContainerKey(""),
506  m_vertexD0ContainerKey(""),
507  m_vertexK0ContainerKey(""),
508  m_cascadeOutputsKeys{ "JpsiPlusDs1CascadeVtx1", "JpsiPlusDs1CascadeVtx2", "JpsiPlusDs1CascadeVtx3" },
509  m_VxPrimaryCandidateName("PrimaryVertices"),
510  m_jpsiMassLower(0.0),
511  m_jpsiMassUpper(10000.0),
512  m_jpsipiMassLower(0.0),
513  m_jpsipiMassUpper(10000.0),
514  m_D0MassLower(0.0),
515  m_D0MassUpper(10000.0),
516  m_K0MassLower(0.0),
517  m_K0MassUpper(10000.0),
518  m_DstMassLower(0.0),
519  m_DstMassUpper(10000.0),
520  m_MassLower(0.0),
521  m_MassUpper(20000.0),
522  m_vtx0MassHypo(-1),
523  m_vtx1MassHypo(-1),
524  m_vtx2MassHypo(-1),
525  m_vtx0Daug1MassHypo(-1),
526  m_vtx0Daug2MassHypo(-1),
527  m_vtx0Daug3MassHypo(-1),
528  m_vtx1Daug1MassHypo(-1),
529  m_vtx1Daug2MassHypo(-1),
530  m_vtx2Daug1MassHypo(-1),
531  m_vtx2Daug2MassHypo(-1),
532  m_particleDataTable(nullptr),
533  m_mass_jpsi(-1),
534  m_Dx_pid(421),
535  m_constrD0(true),
536  m_constrK0(true),
537  m_constrJpsi(true),
538  m_chi2cut(-1.0),
539  m_iVertexFitter("Trk::TrkVKalVrtFitter"),
540  m_pvRefitter("Analysis::PrimaryVertexRefitter"),
541  m_V0Tools("Trk::V0Tools"),
542  m_CascadeTools("DerivationFramework::CascadeTools")
543  {
544  declareProperty("JpsipiVertices", m_vertexContainerKey);
545  declareProperty("D0Vertices", m_vertexD0ContainerKey);
546  declareProperty("K0Vertices", m_vertexK0ContainerKey);
547  declareProperty("VxPrimaryCandidateName", m_VxPrimaryCandidateName);
548  declareProperty("RefPVContainerName", m_refPVContainerName = "RefittedPrimaryVertices");
549  declareProperty("JpsiMassLowerCut", m_jpsiMassLower);
550  declareProperty("JpsiMassUpperCut", m_jpsiMassUpper);
551  declareProperty("JpsipiMassLowerCut", m_jpsipiMassLower);
552  declareProperty("JpsipiMassUpperCut", m_jpsipiMassUpper);
553  declareProperty("D0MassLowerCut", m_D0MassLower);
554  declareProperty("D0MassUpperCut", m_D0MassUpper);
555  declareProperty("K0MassLowerCut", m_K0MassLower);
556  declareProperty("K0MassUpperCut", m_K0MassUpper);
557  declareProperty("DstMassLowerCut", m_DstMassLower);
558  declareProperty("DstMassUpperCut", m_DstMassUpper);
559  declareProperty("MassLowerCut", m_MassLower);
560  declareProperty("MassUpperCut", m_MassUpper);
561  declareProperty("HypothesisName", m_hypoName = "Bc");
562  declareProperty("Vtx0MassHypo", m_vtx0MassHypo);
563  declareProperty("Vtx1MassHypo", m_vtx1MassHypo);
564  declareProperty("Vtx2MassHypo", m_vtx2MassHypo);
565  declareProperty("Vtx0Daug1MassHypo", m_vtx0Daug1MassHypo);
566  declareProperty("Vtx0Daug2MassHypo", m_vtx0Daug2MassHypo);
567  declareProperty("Vtx0Daug3MassHypo", m_vtx0Daug3MassHypo);
568  declareProperty("Vtx1Daug1MassHypo", m_vtx1Daug1MassHypo);
569  declareProperty("Vtx1Daug2MassHypo", m_vtx1Daug2MassHypo);
570  declareProperty("Vtx2Daug1MassHypo", m_vtx2Daug1MassHypo);
571  declareProperty("Vtx2Daug2MassHypo", m_vtx2Daug2MassHypo);
572  declareProperty("JpsiMass", m_mass_jpsi);
573  declareProperty("DxHypothesis", m_Dx_pid);
574  declareProperty("ApplyD0MassConstraint", m_constrD0);
575  declareProperty("ApplyK0MassConstraint", m_constrK0);
576  declareProperty("ApplyJpsiMassConstraint", m_constrJpsi);
577  declareProperty("Chi2Cut", m_chi2cut);
578  declareProperty("RefitPV", m_refitPV = true);
579  declareProperty("MaxnPV", m_PV_max = 999);
580  declareProperty("MinNTracksInPV", m_PV_minNTracks = 0);
581  declareProperty("DoVertexType", m_DoVertexType = 7);
582  declareProperty("TrkVertexFitterTool", m_iVertexFitter);
583  declareProperty("PVRefitter", m_pvRefitter);
584  declareProperty("V0Tools", m_V0Tools);
585  declareProperty("CascadeTools", m_CascadeTools);
586  declareProperty("CascadeVertexCollections", m_cascadeOutputsKeys);
587  }
588 
589  JpsiPlusDs1Cascade::~JpsiPlusDs1Cascade(){ }
590 
591  StatusCode JpsiPlusDs1Cascade::performSearch(std::vector<Trk::VxCascadeInfo*> *cascadeinfoContainer) const
592  {
593  ATH_MSG_DEBUG( "JpsiPlusDs1Cascade::performSearch" );
594  assert(cascadeinfoContainer!=nullptr);
595 
596  // Get TrackParticle container (for setting links to the original tracks)
597  const xAOD::TrackParticleContainer *trackContainer(nullptr);
598  ATH_CHECK(evtStore()->retrieve(trackContainer , "InDetTrackParticles" ));
599 
600  // Get Jpsi+pi container
601  const xAOD::VertexContainer *jpsipiContainer(nullptr);
602  ATH_CHECK(evtStore()->retrieve(jpsipiContainer , m_vertexContainerKey ));
603 
604  // Get D0 container
605  const xAOD::VertexContainer *d0Container(nullptr);
606  ATH_CHECK(evtStore()->retrieve(d0Container , m_vertexD0ContainerKey ));
607 
608  // Get K_S0 container
609  const xAOD::VertexContainer *k0Container(nullptr);
610  ATH_CHECK(evtStore()->retrieve(k0Container , m_vertexK0ContainerKey ));
611 
612  double mass_d0 = m_vtx1MassHypo;
613  double mass_k0 = m_vtx2MassHypo;
614  std::vector<const xAOD::TrackParticle*> tracksJpsipi;
615  std::vector<const xAOD::TrackParticle*> tracksJpsi;
616  std::vector<const xAOD::TrackParticle*> tracksD0;
617  std::vector<const xAOD::TrackParticle*> tracksK0;
618  std::vector<const xAOD::TrackParticle*> tracksBc;
619  std::vector<double> massesJpsipi;
620  massesJpsipi.push_back(m_vtx0Daug1MassHypo);
621  massesJpsipi.push_back(m_vtx0Daug2MassHypo);
622  massesJpsipi.push_back(m_vtx0Daug3MassHypo);
623  std::vector<double> massesD0;
624  massesD0.push_back(m_vtx1Daug1MassHypo);
625  massesD0.push_back(m_vtx1Daug2MassHypo);
626  std::vector<double> massesD0b; // Change the oreder of masses for D*-->D0bar pi-, D0bar->K+pi-
627  massesD0b.push_back(m_vtx1Daug2MassHypo);
628  massesD0b.push_back(m_vtx1Daug1MassHypo);
629  std::vector<double> massesK0;
630  massesK0.push_back(m_vtx2Daug1MassHypo);
631  massesK0.push_back(m_vtx2Daug2MassHypo);
632  std::vector<double> Masses;
633  Masses.push_back(m_vtx0Daug1MassHypo);
634  Masses.push_back(m_vtx0Daug2MassHypo);
635  Masses.push_back(m_vtx0Daug3MassHypo);
636  Masses.push_back(m_vtx1MassHypo);
637  Masses.push_back(m_vtx2MassHypo);
638 
639  // Select J/psi pi+ candidates before calling cascade fit
640  std::vector<const xAOD::Vertex*> selectedJpsipiCandidates;
641  for(auto vxcItr=jpsipiContainer->cbegin(); vxcItr!=jpsipiContainer->cend(); ++vxcItr) {
642 
643  // Check the passed flag first
644  const xAOD::Vertex* vtx = *vxcItr;
645  SG::AuxElement::Accessor<Char_t> flagAcc1("passed_Jpsipi");
646  if(flagAcc1.isAvailable(*vtx)){
647  if(!flagAcc1(*vtx)) continue;
648  }
649 
650  // Check J/psi candidate invariant mass and skip if need be
651  TLorentzVector p4Mup_in, p4Mum_in;
652  p4Mup_in.SetPtEtaPhiM((*vxcItr)->trackParticle(0)->pt(),
653  (*vxcItr)->trackParticle(0)->eta(),
654  (*vxcItr)->trackParticle(0)->phi(), m_vtx0Daug1MassHypo);
655  p4Mum_in.SetPtEtaPhiM((*vxcItr)->trackParticle(1)->pt(),
656  (*vxcItr)->trackParticle(1)->eta(),
657  (*vxcItr)->trackParticle(1)->phi(), m_vtx0Daug2MassHypo);
658  double mass_Jpsi = (p4Mup_in + p4Mum_in).M();
659  ATH_MSG_DEBUG("Jpsi mass " << mass_Jpsi);
660  if (mass_Jpsi < m_jpsiMassLower || mass_Jpsi > m_jpsiMassUpper) {
661  ATH_MSG_DEBUG(" Original Jpsi candidate rejected by the mass cut: mass = "
662  << mass_Jpsi << " != (" << m_jpsiMassLower << ", " << m_jpsiMassUpper << ")" );
663  continue;
664  }
665 
666  // Check J/psi pi+ candidate invariant mass and skip if need be
667  double mass_Jpsipi = m_V0Tools->invariantMass(*vxcItr, massesJpsipi);
668  ATH_MSG_DEBUG("Jpsipi mass " << mass_Jpsipi);
669  if (mass_Jpsipi < m_jpsipiMassLower || mass_Jpsipi > m_jpsipiMassUpper) {
670  ATH_MSG_DEBUG(" Original Jpsipi candidate rejected by the mass cut: mass = "
671  << mass_Jpsipi << " != (" << m_jpsipiMassLower << ", " << m_jpsipiMassUpper << ")" );
672  continue;
673  }
674 
675  selectedJpsipiCandidates.push_back(*vxcItr);
676  }
677  if(selectedJpsipiCandidates.size()<1) return StatusCode::SUCCESS;
678 
679  // Select the D0/D0b candidates before calling cascade fit
680  std::vector<const xAOD::Vertex*> selectedD0Candidates;
681  for(auto vxcItr=d0Container->cbegin(); vxcItr!=d0Container->cend(); ++vxcItr) {
682 
683  // Check the passed flag first
684  const xAOD::Vertex* vtx = *vxcItr;
685  SG::AuxElement::Accessor<Char_t> flagAcc1("passed_D0");
686  SG::AuxElement::Accessor<Char_t> flagAcc2("passed_D0b");
687  bool isD0(true);
688  bool isD0b(true);
689  if(flagAcc1.isAvailable(*vtx)){
690  if(!flagAcc1(*vtx)) isD0 = false;
691  }
692  if(flagAcc2.isAvailable(*vtx)){
693  if(!flagAcc2(*vtx)) isD0b = false;
694  }
695  if(!(isD0||isD0b)) continue;
696 
697  // Ensure the total charge is correct
698  if ((*vxcItr)->trackParticle(0)->charge() != 1 || (*vxcItr)->trackParticle(1)->charge() != -1) {
699  ATH_MSG_DEBUG(" Original D0/D0-bar candidate rejected by the charge requirement: "
700  << (*vxcItr)->trackParticle(0)->charge() << ", " << (*vxcItr)->trackParticle(1)->charge() );
701  continue;
702  }
703 
704  // Check D0/D0bar candidate invariant mass and skip if need be
705  double mass_D0 = m_V0Tools->invariantMass(*vxcItr,massesD0);
706  double mass_D0b = m_V0Tools->invariantMass(*vxcItr,massesD0b);
707  ATH_MSG_DEBUG("D0 mass " << mass_D0 << ", D0b mass "<<mass_D0b);
708  if ((mass_D0 < m_D0MassLower || mass_D0 > m_D0MassUpper) && (mass_D0b < m_D0MassLower || mass_D0b > m_D0MassUpper)) {
709  ATH_MSG_DEBUG(" Original D0 candidate rejected by the mass cut: mass = "
710  << mass_D0 << " != (" << m_D0MassLower << ", " << m_D0MassUpper << ") "
711  << mass_D0b << " != (" << m_D0MassLower << ", " << m_D0MassUpper << ") " );
712  continue;
713  }
714 
715  selectedD0Candidates.push_back(*vxcItr);
716  }
717  if(selectedD0Candidates.size()<1) return StatusCode::SUCCESS;
718 
719  // Select the D0/D0b candidates before calling cascade fit
720  std::vector<const xAOD::Vertex*> selectedK0Candidates;
721  for(auto vxcItr=k0Container->cbegin(); vxcItr!=k0Container->cend(); ++vxcItr) {
722 
723  // Check the passed flag first
724  const xAOD::Vertex* vtx = *vxcItr;
725  SG::AuxElement::Accessor<Char_t> flagAcc1("passed_K0");
726  if(flagAcc1.isAvailable(*vtx)){
727  if(!flagAcc1(*vtx)) continue;
728  }
729 
730  // Check K_S0 candidate invariant mass and skip if need be
731  double mass_K0 = m_V0Tools->invariantMass(*vxcItr, massesK0);
732  ATH_MSG_DEBUG("K_S0 mass " << mass_K0);
733  if (mass_K0 < m_K0MassLower || mass_K0 > m_K0MassUpper) {
734  ATH_MSG_DEBUG(" Original K_S0 candidate rejected by the mass cut: mass = "
735  << mass_K0 << " != (" << m_K0MassLower << ", " << m_K0MassUpper << ")" );
736  continue;
737  }
738 
739  selectedK0Candidates.push_back(*vxcItr);
740  }
741  if(selectedK0Candidates.size()<1) return StatusCode::SUCCESS;
742 
743  // Select J/psi D*+ candidates
744  // Iterate over Jpsi+pi vertices
745  for(auto jpsipiItr=selectedJpsipiCandidates.cbegin(); jpsipiItr!=selectedJpsipiCandidates.cend(); ++jpsipiItr) {
746 
747  size_t jpsipiTrkNum = (*jpsipiItr)->nTrackParticles();
748  tracksJpsipi.clear();
749  tracksJpsi.clear();
750  for( unsigned int it=0; it<jpsipiTrkNum; it++) tracksJpsipi.push_back((*jpsipiItr)->trackParticle(it));
751  for( unsigned int it=0; it<jpsipiTrkNum-1; it++) tracksJpsi.push_back((*jpsipiItr)->trackParticle(it));
752 
753  if (tracksJpsipi.size() != 3 || massesJpsipi.size() != 3 ) {
754  ATH_MSG_INFO("problems with Jpsi+pi input");
755  }
756 
757  bool tagD0(true);
758  if(abs(m_Dx_pid)==421 && (*jpsipiItr)->trackParticle(2)->charge()==-1) tagD0 = false;
759 
760  TLorentzVector p4_pi1; // Momentum of soft pion
761  p4_pi1.SetPtEtaPhiM((*jpsipiItr)->trackParticle(2)->pt(),
762  (*jpsipiItr)->trackParticle(2)->eta(),
763  (*jpsipiItr)->trackParticle(2)->phi(), m_vtx0Daug3MassHypo);
764 
765  // Iterate over D0/D0bar vertices
766  for(auto d0Itr=selectedD0Candidates.cbegin(); d0Itr!=selectedD0Candidates.cend(); ++d0Itr) {
767 
768  // Check identical tracks in input
769  if(std::find(tracksJpsipi.cbegin(), tracksJpsipi.cend(), (*d0Itr)->trackParticle(0)) != tracksJpsipi.cend()) continue;
770  if(std::find(tracksJpsipi.cbegin(), tracksJpsipi.cend(), (*d0Itr)->trackParticle(1)) != tracksJpsipi.cend()) continue;
771 
772  TLorentzVector p4_ka, p4_pi2;
773  if(tagD0){ // for D*+
774  p4_pi2.SetPtEtaPhiM((*d0Itr)->trackParticle(0)->pt(),
775  (*d0Itr)->trackParticle(0)->eta(),
776  (*d0Itr)->trackParticle(0)->phi(), m_vtx1Daug1MassHypo);
777  p4_ka.SetPtEtaPhiM( (*d0Itr)->trackParticle(1)->pt(),
778  (*d0Itr)->trackParticle(1)->eta(),
779  (*d0Itr)->trackParticle(1)->phi(), m_vtx1Daug2MassHypo);
780  }else{ // change the order in the case of D*-
781  p4_pi2.SetPtEtaPhiM((*d0Itr)->trackParticle(1)->pt(),
782  (*d0Itr)->trackParticle(1)->eta(),
783  (*d0Itr)->trackParticle(1)->phi(), m_vtx1Daug1MassHypo);
784  p4_ka.SetPtEtaPhiM( (*d0Itr)->trackParticle(0)->pt(),
785  (*d0Itr)->trackParticle(0)->eta(),
786  (*d0Itr)->trackParticle(0)->phi(), m_vtx1Daug2MassHypo);
787  }
788  // Check D*+/- candidate invariant mass and skip if need be
789  double mass_Dst= (p4_pi1 + p4_ka + p4_pi2).M();
790  ATH_MSG_DEBUG("D*+/- mass " << mass_Dst);
791  if (mass_Dst < m_DstMassLower || mass_Dst > m_DstMassUpper) {
792  ATH_MSG_DEBUG(" Original D*+/- candidate rejected by the mass cut: mass = "
793  << mass_Dst << " != (" << m_DstMassLower << ", " << m_DstMassUpper << ")" );
794  continue;
795  }
796 
797  size_t d0TrkNum = (*d0Itr)->nTrackParticles();
798  tracksD0.clear();
799  for( unsigned int it=0; it<d0TrkNum; it++) tracksD0.push_back((*d0Itr)->trackParticle(it));
800  if (tracksD0.size() != 2 || massesD0.size() != 2 ) {
801  ATH_MSG_INFO("problems with D0 input");
802  }
803 
804  // Iterate over K0 vertices
805  for(auto k0Itr=selectedK0Candidates.cbegin(); k0Itr!=selectedK0Candidates.cend(); ++k0Itr) {
806 
807  // Check identical tracks in input
808  if(std::find(tracksJpsipi.cbegin(), tracksJpsipi.cend(), (*k0Itr)->trackParticle(0)) != tracksJpsipi.cend()) continue;
809  if(std::find(tracksJpsipi.cbegin(), tracksJpsipi.cend(), (*k0Itr)->trackParticle(1)) != tracksJpsipi.cend()) continue;
810  if(std::find(tracksD0.cbegin(), tracksD0.cend(), (*k0Itr)->trackParticle(0)) != tracksD0.cend()) continue;
811  if(std::find(tracksD0.cbegin(), tracksD0.cend(), (*k0Itr)->trackParticle(1)) != tracksD0.cend()) continue;
812 
813  size_t k0TrkNum = (*k0Itr)->nTrackParticles();
814  tracksK0.clear();
815  for( unsigned int it=0; it<k0TrkNum; it++) tracksK0.push_back((*k0Itr)->trackParticle(it));
816  if (tracksK0.size() != 2 || massesK0.size() != 2 ) {
817  ATH_MSG_INFO("problems with K0 input");
818  }
819 
820  ATH_MSG_DEBUG("using tracks" << tracksJpsipi[0] << ", " << tracksJpsipi[1] << ", " << tracksJpsipi[2] << ", " << tracksD0[0] << ", " << tracksD0[1] << ", " << tracksK0[0] << ", " << tracksK0[1]);
821 
822  tracksBc.clear();
823  for( unsigned int it=0; it<jpsipiTrkNum; it++) tracksBc.push_back((*jpsipiItr)->trackParticle(it));
824  for( unsigned int it=0; it<d0TrkNum; it++) tracksBc.push_back((*d0Itr)->trackParticle(it));
825  for( unsigned int it=0; it<k0TrkNum; it++) tracksBc.push_back((*k0Itr)->trackParticle(it));
826 
827 
828  // Apply the user's settings to the fitter
829  // Reset
830  std::unique_ptr<Trk::IVKalState> state (m_iVertexFitter->makeState());
831  // Robustness
832  int robustness = 0;
833  m_iVertexFitter->setRobustness(robustness, *state);
834  // Build up the topology
835  // Vertex list
836  std::vector<Trk::VertexID> vrtList;
837  // K_S0 vertex
838  Trk::VertexID vK0ID;
839  if (m_constrK0) {
840  vK0ID = m_iVertexFitter->startVertex(tracksK0,massesK0, *state, mass_k0);
841  } else {
842  vK0ID = m_iVertexFitter->startVertex(tracksK0,massesK0, *state);
843  }
844  vrtList.push_back(vK0ID);
845  // D0 vertex
846  Trk::VertexID vD0ID;
847  if (m_constrD0) {
848  if(tagD0) vD0ID = m_iVertexFitter->nextVertex(tracksD0,massesD0, *state, mass_d0);
849  else vD0ID = m_iVertexFitter->nextVertex(tracksD0,massesD0b, *state, mass_d0);
850  } else {
851  if(tagD0) vD0ID = m_iVertexFitter->nextVertex(tracksD0,massesD0, *state);
852  else vD0ID = m_iVertexFitter->nextVertex(tracksD0,massesD0b, *state);
853  }
854  vrtList.push_back(vD0ID);
855  // B vertex including Jpsi+pi
856  Trk::VertexID vBcID = m_iVertexFitter->nextVertex(tracksJpsipi,massesJpsipi,vrtList, *state);
857  if (m_constrJpsi) {
858  std::vector<Trk::VertexID> cnstV;
859  cnstV.clear();
860  if ( !m_iVertexFitter->addMassConstraint(vBcID,tracksJpsi,cnstV, *state, m_mass_jpsi).isSuccess() ) {
861  ATH_MSG_WARNING("addMassConstraint failed");
862  //return StatusCode::FAILURE;
863  }
864  }
865  // Do the work
866  std::unique_ptr<Trk::VxCascadeInfo> result(m_iVertexFitter->fitCascade(*state));
867 
868  if (result != nullptr) {
869 
870  // reset links to original tracks
871  BPhysPVCascadeTools::PrepareVertexLinks(result.get(), trackContainer);
872  ATH_MSG_DEBUG("storing tracks " << ((result->vertices())[0])->trackParticle(0) << ", "
873  << ((result->vertices())[0])->trackParticle(1) << ", "
874  << ((result->vertices())[1])->trackParticle(0) << ", "
875  << ((result->vertices())[1])->trackParticle(1) << ", "
876  << ((result->vertices())[2])->trackParticle(0) << ", "
877  << ((result->vertices())[2])->trackParticle(1) << ", "
878  << ((result->vertices())[2])->trackParticle(2));
879  // necessary to prevent memory leak
880  result->setSVOwnership(true);
881 
882  // Chi2/DOF cut
883  double bChi2DOF = result->fitChi2()/result->nDoF();
884  ATH_MSG_DEBUG("Candidate chi2/DOF is " << bChi2DOF);
885  bool chi2CutPassed = (m_chi2cut <= 0.0 || bChi2DOF < m_chi2cut);
886 
887  const std::vector< std::vector<TLorentzVector> > &moms = result->getParticleMoms();
888  double mass = m_CascadeTools->invariantMass(moms[2]);
889  if(chi2CutPassed) {
890  if (mass >= m_MassLower && mass <= m_MassUpper) {
891  cascadeinfoContainer->push_back(result.release());
892  } else {
893  ATH_MSG_DEBUG("Candidate rejected by the mass cut: mass = "
894  << mass << " != (" << m_MassLower << ", " << m_MassUpper << ")" );
895  }
896  }
897  }
898 
899  } //Iterate over K0 vertices
900 
901  } //Iterate over D0 vertices
902 
903  } //Iterate over Jpsi+pi vertices
904 
905  ATH_MSG_DEBUG("cascadeinfoContainer size " << cascadeinfoContainer->size());
906 
907  return StatusCode::SUCCESS;
908  }
909 
910 }
python.PyKernel.retrieve
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xAOD::BPhysHypoHelper::setMass
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Returns the x position.
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Helper class to provide type-safe access to aux data.
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: B-physics xAOD helpers.
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Get the pointer to a given track that was used in vertex reco.
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Returns the z position.
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Class describing a Vertex.
Definition: Vertex_v1.h:42
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Definition: JpsiPlusDs1Cascade.h:69
ATH_MSG_WARNING
#define ATH_MSG_WARNING(x)
Definition: AthMsgStreamMacros.h:32
DerivationFramework::JpsiPlusDs1Cascade::m_vertexD0ContainerKey
std::string m_vertexD0ContainerKey
Definition: JpsiPlusDs1Cascade.h:52
DerivationFramework::JpsiPlusDs1Cascade::~JpsiPlusDs1Cascade
~JpsiPlusDs1Cascade()
Definition: JpsiPlusDs1Cascade.cxx:589
xAOD::Vertex_v1::y
float y() const
Returns the y position.
DerivationFramework::JpsiPlusDs1Cascade::m_Dx_pid
int m_Dx_pid
Definition: JpsiPlusDs1Cascade.h:83
DerivationFramework::JpsiPlusDs1Cascade::m_vtx2MassHypo
double m_vtx2MassHypo
Definition: JpsiPlusDs1Cascade.h:72
DerivationFramework::JpsiPlusDs1Cascade::m_D0MassLower
double m_D0MassLower
Definition: JpsiPlusDs1Cascade.h:62
SG::ConstAccessor< T, AuxAllocator_t< T > >::isAvailable
bool isAvailable(const ELT &e) const
Test to see if this variable exists in the store.
DataVector::cbegin
const_iterator cbegin() const noexcept
Return a const_iterator pointing at the beginning of the collection.
DerivationFramework::JpsiPlusDs1Cascade::m_iVertexFitter
ToolHandle< Trk::TrkVKalVrtFitter > m_iVertexFitter
Definition: JpsiPlusDs1Cascade.h:90
AthAlgTool
Definition: AthAlgTool.h:26
DerivationFramework::JpsiPlusDs1Cascade::m_mass_jpsi
double m_mass_jpsi
Definition: JpsiPlusDs1Cascade.h:82
DataVector::size
size_type size() const noexcept
Returns the number of elements in the collection.
DerivationFramework::JpsiPlusDs1Cascade::m_vtx0Daug1MassHypo
double m_vtx0Daug1MassHypo
Definition: JpsiPlusDs1Cascade.h:73
DerivationFramework::JpsiPlusDs1Cascade::m_jpsipiMassUpper
double m_jpsipiMassUpper
Definition: JpsiPlusDs1Cascade.h:61
DerivationFramework::JpsiPlusDs1Cascade::m_K0MassUpper
double m_K0MassUpper
Definition: JpsiPlusDs1Cascade.h:65
DerivationFramework::JpsiPlusDs1Cascade::m_constrD0
bool m_constrD0
Definition: JpsiPlusDs1Cascade.h:84
HepMCHelpers.h
xAOD::BPhysHypoHelper::setMassErr
bool setMassErr(const float val)
invariant mass error
Definition: BPhysHypoHelper.cxx:57
DerivationFramework::JpsiPlusDs1Cascade::m_DstMassUpper
double m_DstMassUpper
Definition: JpsiPlusDs1Cascade.h:67
VertexAuxContainer.h
xAOD::TrackParticle_v1::phi
virtual double phi() const override final
The azimuthal angle ( ) of the particle (has range to .)
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