ATLAS Offline Software
MuPlusDpstCascade.cxx
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1 /*
2  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
3 */
5 // MuPlusDpstCascade.cxx, (c) ATLAS Detector software
7 #include "MuPlusDpstCascade.h"
8 #include "TrkVertexFitterInterfaces/IVertexFitter.h"
9 #include "TrkVKalVrtFitter/TrkVKalVrtFitter.h"
10 #include "TrkVertexAnalysisUtils/V0Tools.h"
11 #include "DerivationFrameworkBPhys/CascadeTools.h"
12 #include "BPhysPVCascadeTools.h"
13 #include "xAODTracking/VertexAuxContainer.h"
14 #include "xAODTracking/Vertex.h"
15 #include "xAODBPhys/BPhysHypoHelper.h"
16 #include <algorithm>
17 #include "xAODTracking/VertexContainer.h"
18 #include "HepPDT/ParticleDataTable.hh"
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 
28  StatusCode MuPlusDpstCascade::initialize() {
29  // retrieving vertex Fitter
30  ATH_CHECK( m_iVertexFitter.retrieve());
31 
32  // retrieving the V0 tools
33  ATH_CHECK( m_V0Tools.retrieve());
34 
35  // retrieving the Cascade tools
36  ATH_CHECK( m_CascadeTools.retrieve());
37 
38  ATH_CHECK( m_eventInfo_key.initialize() );
39 
40  //======================== inDetTrack selection tool ==================
41  m_trackSelectionTools = std::make_unique<InDet::InDetTrackSelectionTool>("TrackSelector");
42  ANA_CHECK(m_trackSelectionTools->setProperty("CutLevel", "LoosePrimary"));
43  ANA_CHECK(m_trackSelectionTools->initialize() );
44  //=====================================================================
45 
46  ATH_CHECK( m_partPropSvc.retrieve() );
47  auto pdt = m_partPropSvc->PDT();
48 
49  // retrieve particle masses
50  if(m_vtx0MassHypo < 0.) m_vtx0MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::BCPLUS);
51  if(m_vtx1MassHypo < 0.) m_vtx1MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::D0);
52 
53  if(m_vtx0Daug1MassHypo < 0.) m_vtx0Daug1MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::MUON);
54  if(m_vtx0Daug2MassHypo < 0.) m_vtx0Daug2MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::PIPLUS);
55  if(m_vtx1Daug1MassHypo < 0.) m_vtx1Daug1MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::PIPLUS);
56  if(m_vtx1Daug2MassHypo < 0.) m_vtx1Daug2MassHypo = BPhysPVCascadeTools::getParticleMass(pdt, MC::KPLUS);
57 
58  return StatusCode::SUCCESS;
59  }
60 
61 
62  StatusCode MuPlusDpstCascade::addBranches(const EventContext& ctx) const
63  {
64  std::vector<Trk::VxCascadeInfo*> cascadeinfoContainer;
65  constexpr int topoN = 2;
66  std::array<xAOD::VertexContainer*, topoN> Vtxwritehandles;
67  std::array<xAOD::VertexAuxContainer*, topoN> Vtxwritehandlesaux;
68  if(m_cascadeOutputsKeys.size() !=topoN) { ATH_MSG_FATAL("Incorrect number of VtxContainers"); return StatusCode::FAILURE; }
69 
70  for(int i =0; i<topoN;i++){
71  Vtxwritehandles[i] = new xAOD::VertexContainer();
72  Vtxwritehandlesaux[i] = new xAOD::VertexAuxContainer();
73  Vtxwritehandles[i]->setStore(Vtxwritehandlesaux[i]);
74  ATH_CHECK(evtStore()->record(Vtxwritehandles[i] , m_cascadeOutputsKeys[i] )); // FIXME Use Handles
75  ATH_CHECK(evtStore()->record(Vtxwritehandlesaux[i], m_cascadeOutputsKeys[i] + "Aux.")); // FIXME Use Handles
76  }
77 
78  //----------------------------------------------------
79  // retrieve primary vertices
80  //----------------------------------------------------
81  const xAOD::Vertex * primaryVertex{};
82  const xAOD::VertexContainer *pvContainer{};
83  ATH_CHECK(evtStore()->retrieve(pvContainer, m_VxPrimaryCandidateName)); // FIXME Use Handles
84  ATH_MSG_DEBUG("Found " << m_VxPrimaryCandidateName << " in StoreGate!");
85 
86  if (pvContainer->size()==0){
87  ATH_MSG_WARNING("You have no primary vertices: " << pvContainer->size());
88  return StatusCode::RECOVERABLE;
89  } else {
90  primaryVertex = (*pvContainer)[0];
91  }
92 
93  //----------------------------------------------------
94  // Try to retrieve refitted primary vertices
95  //----------------------------------------------------
96  xAOD::VertexContainer* refPvContainer{};
97  xAOD::VertexAuxContainer* refPvAuxContainer{};
98  if (m_refitPV) {
99  if (evtStore()->contains<xAOD::VertexContainer>(m_refPVContainerName)) {
100  // refitted PV container exists. Get it from the store gate
101  ATH_CHECK(evtStore()->retrieve(refPvContainer , m_refPVContainerName )); // FIXME Use Handles
102  ATH_CHECK(evtStore()->retrieve(refPvAuxContainer, m_refPVContainerName + "Aux.")); // FIXME Use Handles
103  } else {
104  // refitted PV container does not exist. Create a new one.
105  refPvContainer = new xAOD::VertexContainer;
106  refPvAuxContainer = new xAOD::VertexAuxContainer;
107  refPvContainer->setStore(refPvAuxContainer);
108  ATH_CHECK(evtStore()->record(refPvContainer , m_refPVContainerName)); // FIXME Use Handles
109  ATH_CHECK(evtStore()->record(refPvAuxContainer, m_refPVContainerName+"Aux.")); // FIXME Use Handles
110  }
111  }
112 
113  ATH_CHECK(performSearch(&cascadeinfoContainer, ctx));
114  SG::ReadHandle<xAOD::EventInfo> evt(m_eventInfo_key, ctx);
115  if(!evt.isValid()) {
116  ATH_MSG_ERROR("Cannot Retrieve " << m_eventInfo_key.key() );
117  return StatusCode::FAILURE;
118  }
119 
120  BPhysPVCascadeTools helper(&(*m_CascadeTools), evt.cptr());
121  helper.SetMinNTracksInPV(m_PV_minNTracks);
122  // Decorators for the main vertex: chi2, ndf, pt and pt error, plus the D0 vertex variables
123  SG::AuxElement::Decorator<VertexLinkVector> CascadeLinksDecor("CascadeVertexLinks");
124  SG::AuxElement::Decorator<VertexLinkVector> MuPiLinksDecor("MuPiVertexLinks");
125  SG::AuxElement::Decorator<VertexLinkVector> D0LinksDecor("D0VertexLinks");
126  SG::AuxElement::Decorator<float> chi2_decor("ChiSquared");
127  SG::AuxElement::Decorator<float> ndof_decor("NumberDoF");
128  SG::AuxElement::Decorator<float> Pt_decor("Pt");
129  SG::AuxElement::Decorator<float> PtErr_decor("PtErr");
130  SG::AuxElement::Decorator<float> Mass_svdecor("D0_mass");
131  SG::AuxElement::Decorator<float> MassErr_svdecor("D0_massErr");
132  SG::AuxElement::Decorator<float> Pt_svdecor("D0_Pt");
133  SG::AuxElement::Decorator<float> PtErr_svdecor("D0_PtErr");
134  SG::AuxElement::Decorator<float> Lxy_svdecor("D0_Lxy");
135  SG::AuxElement::Decorator<float> LxyErr_svdecor("D0_LxyErr");
136  SG::AuxElement::Decorator<float> Tau_svdecor("D0_Tau");
137  SG::AuxElement::Decorator<float> TauErr_svdecor("D0_TauErr");
138 
139  SG::AuxElement::Decorator<float> massMuPi_decor("MuPi_mass"); //mu+pi_soft mass before fit
140  SG::AuxElement::Decorator<float> MassKpi_svdecor("Kpi_mass");
141  SG::AuxElement::Decorator<float> MassMuPiAft_decor("MuPiAft_mass"); //mu+pi_soft mass after fit
142  SG::AuxElement::Decorator<float> MassPiD0_decor("PiD0_mass");
143  SG::AuxElement::Decorator<float> MassMuPiPiK_decor("MuPiPiK_mass");
144 
145  SG::AuxElement::Decorator<float> ChargePi_decor("Pi_charge");
146  SG::AuxElement::Decorator<float> ChargeMu_decor("Mu_charge");
147  SG::AuxElement::Decorator<float> ChargeK_decor("K_charge");
148  SG::AuxElement::Decorator<float> ChargePi_s_decor("Pi_s_charge");
149  SG::AuxElement::Decorator<float> Chi2Mu_decor("Mu_chi2");
150  SG::AuxElement::Decorator<float> nDoFMu_decor("Mu_nDoF");
151  //muon contribution to chi2 of the cascade fit
152  SG::AuxElement::Decorator<float> MuChi2B_decor("Mu_chi2_B");
153  SG::AuxElement::Decorator<float> MunDoFB_decor("Mu_nDoF_B");
154 
155 
156  // Get mu+pi container and identify the input mu+pi
157  const xAOD::VertexContainer *MuPiContainer{};
158  ATH_CHECK(evtStore()->retrieve(MuPiContainer , m_vertexContainerKey )); // FIXME Use Handles
159  const xAOD::VertexContainer *d0Container{};
160  ATH_CHECK(evtStore()->retrieve(d0Container , m_vertexD0ContainerKey )); //"D0Vertices" // FIXME Use Handles
161 
162  for (Trk::VxCascadeInfo* x : cascadeinfoContainer) {
163  if(x==nullptr){
164  ATH_MSG_ERROR("cascadeinfoContainer is null");
165  continue;
166  }
167 
168  // the cascade fitter returns:
169  // std::vector<xAOD::Vertex*>, each xAOD::Vertex contains the refitted track parameters (perigee at the vertex position)
170  // vertices[iv] the links to the original TPs and a covariance of size 3+5*NTRK; the chi2 of the total fit
171  // is split between the cascade vertices as per track contribution
172  // std::vector< std::vector<TLorentzVector> >, each std::vector<TLorentzVector> contains the refitted momenta (TLorentzVector)
173  // momenta[iv][...] of all tracks in the corresponding vertex, including any pseudotracks (from cascade vertices)
174  // originating in this vertex; the masses are as assigned in the cascade fit
175  // std::vector<Amg::MatrixX>, the corresponding covariance matrices in momentum space
176  // covariance[iv]
177  // int nDoF, double Chi2
178  //
179  // the invariant mass, pt, lifetime etc. errors should be calculated using the covariance matrices in momentum space as these
180  // take into account the full track-track and track-vertex correlations
181  //
182  // 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.
183  // The covariance terms between the two vertices are not stored. In momentum space momenta[0] contains the 2 V0 tracks,
184  // their momenta add up to the momentum of the 3rd track in momenta[1], the first two being the Jpsi tracks
185 
186  const std::vector<xAOD::Vertex*> &cascadeVertices = x->vertices();
187  if(cascadeVertices.size()!=topoN)
188  ATH_MSG_ERROR("Incorrect number of vertices");
189  if(cascadeVertices[0] == nullptr || cascadeVertices[1] == nullptr) ATH_MSG_ERROR("Error null vertex");
190  // Keep vertices (bear in mind that they come in reverse order!)
191  for(int i =0;i<topoN;i++) Vtxwritehandles[i]->push_back(cascadeVertices[i]);
192 
193  x->setSVOwnership(false); // Prevent Container from deleting vertices
194  const auto mainVertex = cascadeVertices[1]; // this is the B_c+/- vertex
195  const std::vector< std::vector<TLorentzVector> > &moms = x->getParticleMoms();
196 
197  // Set links to cascade vertices
198  std::vector<const xAOD::Vertex*> verticestoLink;
199  verticestoLink.push_back(cascadeVertices[0]);
200  if(Vtxwritehandles[1] == nullptr) ATH_MSG_ERROR("Vtxwritehandles[1] is null");
201  if(!BPhysPVCascadeTools::LinkVertices(CascadeLinksDecor, verticestoLink, Vtxwritehandles[0], cascadeVertices[1]))
202  ATH_MSG_ERROR("Error decorating with cascade vertices");
203 
204  // Identify the input mu+pi_soft
205  const xAOD::Vertex* MuPiVertex = BPhysPVCascadeTools::FindVertex<2>(MuPiContainer, cascadeVertices[1]);
206  ATH_MSG_DEBUG("1 pt mu+pi_soft tracks " << cascadeVertices[1]->trackParticle(0)->pt() << ", " << cascadeVertices[1]->trackParticle(1)->pt());
207  if (MuPiVertex) ATH_MSG_DEBUG("2 pt mu+pi_soft tracks " << MuPiVertex->trackParticle(0)->pt() << ", " << MuPiVertex->trackParticle(1)->pt());
208 
209  // Identify the input D0
210  const xAOD::Vertex* d0Vertex = BPhysPVCascadeTools::FindVertex<2>(d0Container, cascadeVertices[0]);;
211  ATH_MSG_DEBUG("1 pt D0 tracks " << cascadeVertices[0]->trackParticle(0)->pt() << ", " << cascadeVertices[0]->trackParticle(1)->pt());
212  if (d0Vertex) ATH_MSG_DEBUG("2 pt D0 tracks " << d0Vertex->trackParticle(0)->pt() << ", " << d0Vertex->trackParticle(1)->pt());
213 
214  // Set links to input vertices
215  std::vector<const xAOD::Vertex*> MuPiVerticestoLink;
216  if (MuPiVertex) MuPiVerticestoLink.push_back(MuPiVertex);
217  else ATH_MSG_WARNING("Could not find linking mu+pi_soft");
218  if(!BPhysPVCascadeTools::LinkVertices(MuPiLinksDecor, MuPiVerticestoLink, MuPiContainer, cascadeVertices[1]))
219  ATH_MSG_ERROR("Error decorating with mu+pi_soft vertices");
220 
221  std::vector<const xAOD::Vertex*> d0VerticestoLink;
222  if (d0Vertex) d0VerticestoLink.push_back(d0Vertex);
223  else ATH_MSG_WARNING("Could not find linking D0");
224  if(!BPhysPVCascadeTools::LinkVertices(D0LinksDecor, d0VerticestoLink, d0Container, cascadeVertices[1]))
225  ATH_MSG_ERROR("Error decorating with D0 vertices");
226 
227  bool tagD0(true);
228  if (MuPiVertex){
229  if(std::abs(m_Dx_pid)==421 && (MuPiVertex->trackParticle(1)->charge()==-1)) tagD0 = false; //checking soft pion charge
230  }
231 
232  double mass_b = m_vtx0MassHypo;
233  double mass_d0 = m_vtx1MassHypo;
234  std::vector<double> massesMuPi;
235  massesMuPi.push_back(m_vtx0Daug1MassHypo); //mu
236  massesMuPi.push_back(m_vtx0Daug2MassHypo); //pi_soft
237  std::vector<double> massesD0;
238  if(tagD0){
239  massesD0.push_back(m_vtx1Daug1MassHypo); //pi
240  massesD0.push_back(m_vtx1Daug2MassHypo); //K
241  }else{ // Change the order of masses for D*-->D0bar pi-, D0bar->K+pi-
242  massesD0.push_back(m_vtx1Daug2MassHypo); //K
243  massesD0.push_back(m_vtx1Daug1MassHypo); //pi
244  }
245  std::vector<double> Masses; // masses of all particles "inside" of B
246  Masses.push_back(m_vtx0Daug1MassHypo); //mu
247  Masses.push_back(m_vtx0Daug2MassHypo); //pi_soft
248  Masses.push_back(m_vtx1MassHypo); //D0 mass
249 
250  // loop over candidates -- Don't apply PV_minNTracks requirement here
251  // because it may result in exclusion of the high-pt PV.
252  // get good PVs
253 
254  xAOD::BPhysHypoHelper vtx(m_hypoName, mainVertex);
255 
256  // Get refitted track momenta from all vertices, charged tracks only
257  BPhysPVCascadeTools::SetVectorInfo(vtx, x);
258 
259 
260  // Decorate main vertex
261  //
262  // 1.a) mass, mass error
263  BPHYS_CHECK( vtx.setMass(m_CascadeTools->invariantMass(moms[1])) );
264  BPHYS_CHECK( vtx.setMassErr(m_CascadeTools->invariantMassError(moms[1],x->getCovariance()[1])) );
265  // 1.b) pt and pT error (the default pt of mainVertex is != the pt of the full cascade fit!)
266  Pt_decor(*mainVertex) = m_CascadeTools->pT(moms[1]);
267  PtErr_decor(*mainVertex) = m_CascadeTools->pTError(moms[1],x->getCovariance()[1]);
268  // 1.c) chi2 and ndof (the default chi2 of mainVertex is != the chi2 of the full cascade fit!)
269  chi2_decor(*mainVertex) = x->fitChi2();
270  ndof_decor(*mainVertex) = x->nDoF();
271  Chi2Mu_decor(*mainVertex) = cascadeVertices[1]->trackParticle(0)->chiSquared();
272  nDoFMu_decor(*mainVertex) = cascadeVertices[1]->trackParticle(0)->numberDoF();
273 
274  // track contribution to chi2 of cascasde fit
275  std::vector< Trk::VxTrackAtVertex > trkAtB = cascadeVertices[1]->vxTrackAtVertex();
276  MuChi2B_decor(*mainVertex) = trkAtB.at(0).trackQuality().chiSquared();
277  MunDoFB_decor(*mainVertex) = trkAtB.at(0).trackQuality().numberDoF();
278 
279  float massMuPi = 0.;
280  if (MuPiVertex) {
281  TLorentzVector p4_mu1, p4_pi_s;
282  p4_mu1.SetPtEtaPhiM(MuPiVertex->trackParticle(0)->pt(),
283  MuPiVertex->trackParticle(0)->eta(),
284  MuPiVertex->trackParticle(0)->phi(), m_vtx0Daug1MassHypo); //mu
285  p4_pi_s.SetPtEtaPhiM(MuPiVertex->trackParticle(1)->pt(),
286  MuPiVertex->trackParticle(1)->eta(),
287  MuPiVertex->trackParticle(1)->phi(), m_vtx0Daug2MassHypo); // pi_soft
288  massMuPi = (p4_mu1 + p4_pi_s).M();
289  ChargePi_s_decor(*mainVertex) = MuPiVertex->trackParticle(1)->charge();
290  ChargeMu_decor(*mainVertex) = MuPiVertex->trackParticle(0)->charge();
291  }
292  massMuPi_decor(*mainVertex) = massMuPi;
293 
294  //float massKpi = 0.;
295  if (d0Vertex) {
296  TLorentzVector p4_ka, p4_pi;
297  if(tagD0){
298  p4_pi.SetPtEtaPhiM(d0Vertex->trackParticle(0)->pt(),
299  d0Vertex->trackParticle(0)->eta(),
300  d0Vertex->trackParticle(0)->phi(), m_vtx1Daug1MassHypo);
301  p4_ka.SetPtEtaPhiM(d0Vertex->trackParticle(1)->pt(),
302  d0Vertex->trackParticle(1)->eta(),
303  d0Vertex->trackParticle(1)->phi(), m_vtx1Daug2MassHypo);
304  ChargeK_decor(*mainVertex) = d0Vertex->trackParticle(1)->charge();
305  ChargePi_decor(*mainVertex) = d0Vertex->trackParticle(0)->charge();
306 
307  }else{ // Change the oreder of masses for D*-->D0bar pi-, D0bar->K+pi-
308  p4_pi.SetPtEtaPhiM(d0Vertex->trackParticle(1)->pt(),
309  d0Vertex->trackParticle(1)->eta(),
310  d0Vertex->trackParticle(1)->phi(), m_vtx1Daug1MassHypo);
311  p4_ka.SetPtEtaPhiM(d0Vertex->trackParticle(0)->pt(),
312  d0Vertex->trackParticle(0)->eta(),
313  d0Vertex->trackParticle(0)->phi(), m_vtx1Daug2MassHypo);
314  ChargeK_decor(*mainVertex) = d0Vertex->trackParticle(0)->charge();
315  ChargePi_decor(*mainVertex) = d0Vertex->trackParticle(1)->charge();
316  }
317  //massKpi = (p4_ka + p4_pi).M();
318  }
319  MassMuPiAft_decor(*mainVertex) = (moms[1][0] + moms[1][1]).M(); //mu + pi_soft
320  MassPiD0_decor(*mainVertex) = (moms[1][1] + moms[0][0] + moms[0][1]).M(); //pi_soft + D0
321  MassKpi_svdecor(*mainVertex) = (moms[0][0] + moms[0][1]).M();//D0
322  MassMuPiPiK_decor(*mainVertex) = m_CascadeTools->invariantMass(moms[1]); //B0
323 
324  ATH_CHECK(helper.FillCandwithRefittedVertices(m_refitPV, pvContainer, refPvContainer, &(*m_pvRefitter), m_PV_max, m_DoVertexType, x, 1, mass_b, vtx));
325 
326  // 4) decorate the main vertex with D0 vertex mass, pt, lifetime and lxy values (plus errors)
327  // D0 points to the main vertex, so lifetime and lxy are w.r.t the main vertex
328  Mass_svdecor(*mainVertex) = m_CascadeTools->invariantMass(moms[0]);
329  MassErr_svdecor(*mainVertex) = m_CascadeTools->invariantMassError(moms[0],x->getCovariance()[0]);
330  Pt_svdecor(*mainVertex) = m_CascadeTools->pT(moms[0]);
331  PtErr_svdecor(*mainVertex) = m_CascadeTools->pTError(moms[0],x->getCovariance()[0]);
332  Lxy_svdecor(*mainVertex) = m_CascadeTools->lxy(moms[0],cascadeVertices[0],cascadeVertices[1]);
333  LxyErr_svdecor(*mainVertex) = m_CascadeTools->lxyError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1]);
334  Tau_svdecor(*mainVertex) = m_CascadeTools->tau(moms[0],cascadeVertices[0],cascadeVertices[1]);
335  TauErr_svdecor(*mainVertex) = m_CascadeTools->tauError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1]);
336 
337 
338  // Some checks in DEBUG mode
339  ATH_MSG_DEBUG("chi2 " << x->fitChi2() //DEBUG->INFO
340  << " chi2_1 " << m_V0Tools->chisq(cascadeVertices[0])
341  << " chi2_2 " << m_V0Tools->chisq(cascadeVertices[1])
342  << " vprob " << m_CascadeTools->vertexProbability(x->nDoF(),x->fitChi2()));
343  ATH_MSG_DEBUG("ndf " << x->nDoF() << " ndf_1 " << m_V0Tools->ndof(cascadeVertices[0]) << " ndf_2 " << m_V0Tools->ndof(cascadeVertices[1]));
344  ATH_MSG_DEBUG("V0Tools mass_d0 " << m_V0Tools->invariantMass(cascadeVertices[0],massesD0)
345  << " error " << m_V0Tools->invariantMassError(cascadeVertices[0],massesD0)
346  << " mass_J " << m_V0Tools->invariantMass(cascadeVertices[1],massesMuPi)
347  << " error " << m_V0Tools->invariantMassError(cascadeVertices[1],massesMuPi));
348  // masses and errors, using track masses assigned in the fit
349  double Mass_B = m_CascadeTools->invariantMass(moms[1]);
350  double Mass_D0 = m_CascadeTools->invariantMass(moms[0]);
351  double Mass_B_err = m_CascadeTools->invariantMassError(moms[1],x->getCovariance()[1]);
352  double Mass_D0_err = m_CascadeTools->invariantMassError(moms[0],x->getCovariance()[0]);
353  ATH_MSG_DEBUG("Mass_B " << Mass_B << " Mass_D0 " << Mass_D0);
354  ATH_MSG_DEBUG("Mass_B_err " << Mass_B_err << " Mass_D0_err " << Mass_D0_err);
355  double mprob_B = m_CascadeTools->massProbability(mass_b,Mass_B,Mass_B_err);
356  double mprob_D0 = m_CascadeTools->massProbability(mass_d0,Mass_D0,Mass_D0_err);
357  ATH_MSG_DEBUG("mprob_B " << mprob_B << " mprob_D0 " << mprob_D0);
358  // masses and errors, assigning user defined track masses
359  ATH_MSG_DEBUG("Mass_b " << m_CascadeTools->invariantMass(moms[1],Masses)
360  << " Mass_d0 " << m_CascadeTools->invariantMass(moms[0],massesD0));
361  ATH_MSG_DEBUG("Mass_b_err " << m_CascadeTools->invariantMassError(moms[1],x->getCovariance()[1],Masses)
362  << " Mass_d0_err " << m_CascadeTools->invariantMassError(moms[0],x->getCovariance()[0],massesD0));
363  ATH_MSG_DEBUG("pt_b " << m_CascadeTools->pT(moms[1])
364  << " pt_d " << m_CascadeTools->pT(moms[0])
365  << " pt_d0 " << m_V0Tools->pT(cascadeVertices[0]));
366  ATH_MSG_DEBUG("ptErr_b " << m_CascadeTools->pTError(moms[1],x->getCovariance()[1])
367  << " ptErr_d " << m_CascadeTools->pTError(moms[0],x->getCovariance()[0])
368  << " ptErr_d0 " << m_V0Tools->pTError(cascadeVertices[0]));
369  ATH_MSG_DEBUG("lxy_B " << m_V0Tools->lxy(cascadeVertices[1],primaryVertex) << " lxy_D " << m_V0Tools->lxy(cascadeVertices[0],cascadeVertices[1]));
370  ATH_MSG_DEBUG("lxy_b " << m_CascadeTools->lxy(moms[1],cascadeVertices[1],primaryVertex) << " lxy_d " << m_CascadeTools->lxy(moms[0],cascadeVertices[0],cascadeVertices[1]));
371  ATH_MSG_DEBUG("lxyErr_b " << m_CascadeTools->lxyError(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex)
372  << " lxyErr_d " << m_CascadeTools->lxyError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1])
373  << " lxyErr_d0 " << m_V0Tools->lxyError(cascadeVertices[0],cascadeVertices[1]));
374  ATH_MSG_DEBUG("tau_B " << m_CascadeTools->tau(moms[1],cascadeVertices[1],primaryVertex,mass_b)
375  << " tau_d0 " << m_V0Tools->tau(cascadeVertices[0],cascadeVertices[1],massesD0));
376  ATH_MSG_DEBUG("tau_b " << m_CascadeTools->tau(moms[1],cascadeVertices[1],primaryVertex)
377  << " tau_d " << m_CascadeTools->tau(moms[0],cascadeVertices[0],cascadeVertices[1])
378  << " tau_D " << m_CascadeTools->tau(moms[0],cascadeVertices[0],cascadeVertices[1],mass_d0));
379  ATH_MSG_DEBUG("tauErr_b " << m_CascadeTools->tauError(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex)
380  << " tauErr_d " << m_CascadeTools->tauError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1])
381  << " tauErr_d0 " << m_V0Tools->tauError(cascadeVertices[0],cascadeVertices[1],massesD0));
382  ATH_MSG_DEBUG("TauErr_b " << m_CascadeTools->tauError(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex,mass_b)
383  << " TauErr_d " << m_CascadeTools->tauError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1],mass_d0)
384  << " TauErr_d0 " << m_V0Tools->tauError(cascadeVertices[0],cascadeVertices[1],massesD0,mass_d0));
385 
386  ATH_MSG_DEBUG("CascadeTools main vert wrt PV " << " CascadeTools SV " << " V0Tools SV");
387  ATH_MSG_DEBUG("a0z " << m_CascadeTools->a0z(moms[1],cascadeVertices[1],primaryVertex)
388  << ", " << m_CascadeTools->a0z(moms[0],cascadeVertices[0],cascadeVertices[1])
389  << ", " << m_V0Tools->a0z(cascadeVertices[0],cascadeVertices[1]));
390  ATH_MSG_DEBUG("a0zErr " << m_CascadeTools->a0zError(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex)
391  << ", " << m_CascadeTools->a0zError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1])
392  << ", " << m_V0Tools->a0zError(cascadeVertices[0],cascadeVertices[1]));
393  ATH_MSG_DEBUG("a0xy " << m_CascadeTools->a0xy(moms[1],cascadeVertices[1],primaryVertex)
394  << ", " << m_CascadeTools->a0xy(moms[0],cascadeVertices[0],cascadeVertices[1])
395  << ", " << m_V0Tools->a0xy(cascadeVertices[0],cascadeVertices[1]));
396  ATH_MSG_DEBUG("a0xyErr " << m_CascadeTools->a0xyError(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex)
397  << ", " << m_CascadeTools->a0xyError(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1])
398  << ", " << m_V0Tools->a0xyError(cascadeVertices[0],cascadeVertices[1]));
399  ATH_MSG_DEBUG("a0 " << m_CascadeTools->a0(moms[1],cascadeVertices[1],primaryVertex)
400  << ", " << m_CascadeTools->a0(moms[0],cascadeVertices[0],cascadeVertices[1])
401  << ", " << m_V0Tools->a0(cascadeVertices[0],cascadeVertices[1]));
402  ATH_MSG_DEBUG("a0Err " << m_CascadeTools->a0Error(moms[1],x->getCovariance()[1],cascadeVertices[1],primaryVertex)
403  << ", " << m_CascadeTools->a0Error(moms[0],x->getCovariance()[0],cascadeVertices[0],cascadeVertices[1])
404  << ", " << m_V0Tools->a0Error(cascadeVertices[0],cascadeVertices[1]));
405  ATH_MSG_DEBUG("x0 " << m_V0Tools->vtx(cascadeVertices[0]).x() << " y0 " << m_V0Tools->vtx(cascadeVertices[0]).y() << " z0 " << m_V0Tools->vtx(cascadeVertices[0]).z());
406  ATH_MSG_DEBUG("x1 " << m_V0Tools->vtx(cascadeVertices[1]).x() << " y1 " << m_V0Tools->vtx(cascadeVertices[1]).y() << " z1 " << m_V0Tools->vtx(cascadeVertices[1]).z());
407  ATH_MSG_DEBUG("X0 " << primaryVertex->x() << " Y0 " << primaryVertex->y() << " Z0 " << primaryVertex->z());
408  ATH_MSG_DEBUG("rxy0 " << m_V0Tools->rxy(cascadeVertices[0]) << " rxyErr0 " << m_V0Tools->rxyError(cascadeVertices[0]));
409  ATH_MSG_DEBUG("rxy1 " << m_V0Tools->rxy(cascadeVertices[1]) << " rxyErr1 " << m_V0Tools->rxyError(cascadeVertices[1]));
410  ATH_MSG_DEBUG("Rxy0 wrt PV " << m_V0Tools->rxy(cascadeVertices[0],primaryVertex) << " RxyErr0 wrt PV " << m_V0Tools->rxyError(cascadeVertices[0],primaryVertex));
411  ATH_MSG_DEBUG("Rxy1 wrt PV " << m_V0Tools->rxy(cascadeVertices[1],primaryVertex) << " RxyErr1 wrt PV " << m_V0Tools->rxyError(cascadeVertices[1],primaryVertex));
412  ATH_MSG_DEBUG("number of covariance matrices " << (x->getCovariance()).size());
413  } // loop over cascadeinfoContainer
414 
415  // Deleting cascadeinfo since this won't be stored.
416  // Vertices have been kept in m_cascadeOutputs and should be owned by their container
417  for (auto x : cascadeinfoContainer) delete x;
418 
419  return StatusCode::SUCCESS;
420  }
421 
422 
423  MuPlusDpstCascade::MuPlusDpstCascade(const std::string& t, const std::string& n, const IInterface* p) : base_class(t,n,p),
424  m_vertexContainerKey(""),
425  m_vertexD0ContainerKey(""),
426  m_cascadeOutputsKeys{ "MuPlusDpstCascadeVtx1", "MuPlusDpstCascadeVtx2" },
427  m_VxPrimaryCandidateName("PrimaryVertices"),
428  m_MuPiMassLower(0.0),
429  m_MuPiMassUpper(10000.0),
430  m_D0MassLower(0.0),
431  m_D0MassUpper(10000.0),
432  m_DstMassLower(0.0),
433  m_DstMassUpper(10000.0),
434  m_DstMassUpperAft(10000.0),
435  m_MassLower(0.0),
436  m_MassUpper(20000.0),
437  m_vtx0MassHypo(-1),
438  m_vtx1MassHypo(-1),
439  m_vtx0Daug1MassHypo(-1),
440  m_vtx0Daug2MassHypo(-1),
441  m_vtx1Daug1MassHypo(-1),
442  m_vtx1Daug2MassHypo(-1),
443  m_Dx_pid(421),
444  m_constrD0(true),
445  m_constrMuPi(false),
446  m_chi2cut(-1.0),
447  m_iVertexFitter("Trk::TrkVKalVrtFitter"),
448  m_pvRefitter("Analysis::PrimaryVertexRefitter", this),
449  m_V0Tools("Trk::V0Tools"),
450  m_CascadeTools("DerivationFramework::CascadeTools")
451  {
452  declareProperty("MuPiVertices", m_vertexContainerKey);
453  declareProperty("D0Vertices", m_vertexD0ContainerKey);
454  declareProperty("VxPrimaryCandidateName", m_VxPrimaryCandidateName);
455  declareProperty("RefPVContainerName", m_refPVContainerName = "RefittedPrimaryVertices");
456  declareProperty("MuPiMassLowerCut", m_MuPiMassLower);
457  declareProperty("MuPiMassUpperCut", m_MuPiMassUpper);
458  declareProperty("D0MassLowerCut", m_D0MassLower);
459  declareProperty("D0MassUpperCut", m_D0MassUpper);
460  declareProperty("DstMassLowerCut", m_DstMassLower);
461  declareProperty("DstMassUpperCut", m_DstMassUpper);
462  declareProperty("DstMassUpperCutAft", m_DstMassUpperAft); //mass cut after cascade fit
463  declareProperty("MassLowerCut", m_MassLower);
464  declareProperty("MassUpperCut", m_MassUpper);
465  declareProperty("HypothesisName", m_hypoName = "B");
466  declareProperty("Vtx0MassHypo", m_vtx0MassHypo);
467  declareProperty("Vtx1MassHypo", m_vtx1MassHypo);
468  declareProperty("Vtx0Daug1MassHypo", m_vtx0Daug1MassHypo);
469  declareProperty("Vtx0Daug2MassHypo", m_vtx0Daug2MassHypo);
470  declareProperty("Vtx0Daug3MassHypo", m_vtx0Daug2MassHypo);
471  declareProperty("Vtx1Daug1MassHypo", m_vtx1Daug1MassHypo);
472  declareProperty("Vtx1Daug2MassHypo", m_vtx1Daug2MassHypo);
473  declareProperty("DxHypothesis", m_Dx_pid);
474  declareProperty("ApplyD0MassConstraint", m_constrD0);
475  declareProperty("ApplyMuPiMassConstraint", m_constrMuPi);
476  declareProperty("Chi2Cut", m_chi2cut);
477  declareProperty("RefitPV", m_refitPV = true);
478  declareProperty("MaxnPV", m_PV_max = 999);
479  declareProperty("MinNTracksInPV", m_PV_minNTracks = 0);
480  declareProperty("DoVertexType", m_DoVertexType = 7);
481  declareProperty("TrkVertexFitterTool", m_iVertexFitter);
482  declareProperty("PVRefitter", m_pvRefitter);
483  declareProperty("V0Tools", m_V0Tools);
484  declareProperty("CascadeTools", m_CascadeTools);
485  declareProperty("CascadeVertexCollections", m_cascadeOutputsKeys);
486  }
487 
488  MuPlusDpstCascade::~MuPlusDpstCascade(){ }
489 
490  StatusCode MuPlusDpstCascade::performSearch(std::vector<Trk::VxCascadeInfo*> *cascadeinfoContainer, const EventContext&) const
491  {
492 
493  assert(cascadeinfoContainer!=nullptr);
494 
495  // Get TrackParticle container (for setting links to the original tracks)
496  const xAOD::TrackParticleContainer *trackContainer{};
497  ATH_CHECK(evtStore()->retrieve(trackContainer , "InDetTrackParticles" )); // FIXME Use Handles
498 
499  // Get mu+pi container
500  const xAOD::VertexContainer *MuPiContainer{};
501  ATH_CHECK(evtStore()->retrieve(MuPiContainer , m_vertexContainerKey )); // FIXME Use Handles
502 
503  // Get D0 container
504  const xAOD::VertexContainer *d0Container{};
505  ATH_CHECK(evtStore()->retrieve(d0Container , m_vertexD0ContainerKey )); //"D0Vertices" // FIXME Use Handles
506 
507  double mass_d0 = m_vtx1MassHypo;
508  std::vector<const xAOD::TrackParticle*> tracksMuPi;
509  std::vector<const xAOD::TrackParticle*> tracksD0;
510  std::vector<double> massesMuPi;
511  massesMuPi.push_back(m_vtx0Daug1MassHypo); //mass mu
512  massesMuPi.push_back(m_vtx0Daug2MassHypo); //mass pi
513  std::vector<double> massesD0;
514  massesD0.push_back(m_vtx1Daug1MassHypo); //mass pi
515  massesD0.push_back(m_vtx1Daug2MassHypo); //mass K
516  std::vector<double> massesD0b; // Change the oreder of masses for D*-->D0bar pi-, D0bar->K+pi-
517  massesD0b.push_back(m_vtx1Daug2MassHypo);
518  massesD0b.push_back(m_vtx1Daug1MassHypo);
519  std::vector<double> Masses;
520  Masses.push_back(m_vtx0Daug1MassHypo); //mu
521  Masses.push_back(m_vtx0Daug2MassHypo); //pi
522  Masses.push_back(m_vtx1MassHypo); //D0
523 
524 
525 
526  // Select mu+pi_soft candidates before calling cascade fit
527  std::vector<const xAOD::Vertex*> selectedMuPiCandidates;
528  for ( auto vxcItr : *MuPiContainer ){
529  // Check mu+pi_soft candidate invariant mass and skip if need be
530  TLorentzVector p4Mup_in, p4Mum_in;
531  p4Mup_in.SetPtEtaPhiM(vxcItr->trackParticle(0)->pt(),
532  vxcItr->trackParticle(0)->eta(),
533  vxcItr->trackParticle(0)->phi(), m_vtx0Daug1MassHypo);
534  p4Mum_in.SetPtEtaPhiM(vxcItr->trackParticle(1)->pt(),
535  vxcItr->trackParticle(1)->eta(),
536  vxcItr->trackParticle(1)->phi(), m_vtx0Daug2MassHypo);
537  double mass_MuPi = (p4Mup_in + p4Mum_in).M();
538  ATH_MSG_DEBUG("mu pi_soft mass " << mass_MuPi);
539  if (mass_MuPi < m_MuPiMassLower || mass_MuPi > m_MuPiMassUpper) {
540  ATH_MSG_DEBUG(" Original mu & pi_soft candidate rejected by the mass cut: mass = "
541  << mass_MuPi << " != (" << m_MuPiMassLower << ", " << m_MuPiMassUpper << ")" );
542  continue;
543  }
544 
545  // Track selection - Loose
546  // for soft pion wich is (2nd) in MuPi vertex
547  if ( !m_trackSelectionTools->accept(vxcItr->trackParticle(1)) ){
548  ATH_MSG_DEBUG(" Original mu & pi_soft candidate rejected by the track's cut level - loose");
549  continue;
550  }
551 
552  selectedMuPiCandidates.push_back(vxcItr);
553  } //for(auto vxcItr : *MuPiContainer)
554  if(selectedMuPiCandidates.size()<1) return StatusCode::SUCCESS;
555 
556  // Select the D0/D0b candidates before calling cascade fit
557  std::vector<const xAOD::Vertex*> selectedD0Candidates;
558  for(auto vxcItr : *d0Container){
559  // Check the passed flag first
560  const xAOD::Vertex* vtx = vxcItr;
561  SG::AuxElement::Accessor<Char_t> flagAcc1("passed_D0");
562  SG::AuxElement::Accessor<Char_t> flagAcc2("passed_D0b");
563  bool isD0(true);
564  bool isD0b(true);
565  if(flagAcc1.isAvailable(*vtx)){
566  if(!flagAcc1(*vtx)) isD0 = false;
567  }
568  if(flagAcc2.isAvailable(*vtx)){
569  if(!flagAcc2(*vtx)) isD0b = false;
570  }
571  if(!(isD0||isD0b)) continue;
572 
573  // Track selection - Loose
574  if ( !m_trackSelectionTools->accept(vxcItr->trackParticle(0)) ){
575  ATH_MSG_DEBUG(" Original D0/D0-bar candidate rejected by the track's cut level - loose ");
576  continue;
577  }
578  if ( !m_trackSelectionTools->accept(vxcItr->trackParticle(1)) ){
579  ATH_MSG_DEBUG(" Original D0/D0-bar candidate rejected by the track's cut level - loose ");
580  continue;
581  }
582 
583 
584  // Ensure the total charge is correct
585  if (vxcItr->trackParticle(0)->charge() != 1 || vxcItr->trackParticle(1)->charge() != -1) {
586  ATH_MSG_DEBUG(" Original D0/D0-bar candidate rejected by the charge requirement: "
587  << vxcItr->trackParticle(0)->charge() << ", " << vxcItr->trackParticle(1)->charge() );
588  continue;
589  }
590 
591  // Check D0/D0bar candidate invariant mass and skip if need be
592  double mass_D0 = m_V0Tools->invariantMass(vxcItr,massesD0);
593  double mass_D0b = m_V0Tools->invariantMass(vxcItr,massesD0b);
594  ATH_MSG_DEBUG("D0 mass " << mass_D0 << ", D0b mass "<<mass_D0b);
595  if ((mass_D0 < m_D0MassLower || mass_D0 > m_D0MassUpper) && (mass_D0b < m_D0MassLower || mass_D0b > m_D0MassUpper)) {
596  ATH_MSG_DEBUG(" Original D0/D0-bar candidate rejected by the mass cut: mass = "
597  << mass_D0 << " != (" << m_D0MassLower << ", " << m_D0MassUpper << ") "
598  << mass_D0b << " != (" << m_D0MassLower << ", " << m_D0MassUpper << ") " );
599  continue;
600  }
601 
602  selectedD0Candidates.push_back(vxcItr);
603  } //for(auto vxcItr : *d0Container)
604  if(selectedD0Candidates.size()<1) return StatusCode::SUCCESS;
605 
606  // Select mu D*+ candidates
607  // Iterate over mu+pi_soft vertices
608  for(auto MuPiItr:selectedMuPiCandidates){
609  size_t MuPiTrkNum = MuPiItr->nTrackParticles();
610 
611  tracksMuPi.clear();
612  for( unsigned int it=0; it<MuPiTrkNum; it++) tracksMuPi.push_back(MuPiItr->trackParticle(it));
613 
614  if (tracksMuPi.size() != 2 || massesMuPi.size() != 2 ) {
615  ATH_MSG_INFO("problems with mu+pi_soft input");
616  }
617 
618  bool tagD0(true);
619  if(std::abs(m_Dx_pid)==421 && MuPiItr->trackParticle(1)->charge()==-1) tagD0 = false;
620 
621  TLorentzVector p4_pi1; // Momentum of soft pion1 = our soft pion (1)
622  p4_pi1.SetPtEtaPhiM(MuPiItr->trackParticle(1)->pt(),
623  MuPiItr->trackParticle(1)->eta(),
624  MuPiItr->trackParticle(1)->phi(), m_vtx0Daug2MassHypo);
625  // Iterate over D0/D0bar vertices
626  for(auto d0Itr : selectedD0Candidates){
627 
628  // Check identical tracks in input
629  if(std::find(tracksMuPi.cbegin(), tracksMuPi.cend(), d0Itr->trackParticle(0)) != tracksMuPi.cend()) continue;
630  if(std::find(tracksMuPi.cbegin(), tracksMuPi.cend(), d0Itr->trackParticle(1)) != tracksMuPi.cend()) continue;
631 
632  TLorentzVector p4_ka, p4_pi2;
633  if(tagD0){ // for D*+
634  p4_pi2.SetPtEtaPhiM(d0Itr->trackParticle(0)->pt(),
635  d0Itr->trackParticle(0)->eta(),
636  d0Itr->trackParticle(0)->phi(), m_vtx1Daug1MassHypo);
637  p4_ka.SetPtEtaPhiM( d0Itr->trackParticle(1)->pt(),
638  d0Itr->trackParticle(1)->eta(),
639  d0Itr->trackParticle(1)->phi(), m_vtx1Daug2MassHypo);
640  }else{ // change the order in the case of D*-
641  p4_pi2.SetPtEtaPhiM(d0Itr->trackParticle(1)->pt(),
642  d0Itr->trackParticle(1)->eta(),
643  d0Itr->trackParticle(1)->phi(), m_vtx1Daug1MassHypo);
644  p4_ka.SetPtEtaPhiM( d0Itr->trackParticle(0)->pt(),
645  d0Itr->trackParticle(0)->eta(),
646  d0Itr->trackParticle(0)->phi(), m_vtx1Daug2MassHypo);
647  }
648  // Check D*+/- candidate invariant mass and skip if need be
649  double mass_Dst= (p4_pi1 + p4_ka + p4_pi2).M();
650  ATH_MSG_DEBUG("D*+/- mass " << mass_Dst);
651  if (mass_Dst < m_DstMassLower || mass_Dst > m_DstMassUpper) {
652  ATH_MSG_DEBUG(" Original D*+/- candidate rejected by the mass cut: mass = "
653  << mass_Dst << " != (" << m_DstMassLower << ", " << m_DstMassUpper << ")" );
654  continue;
655  }
656 
657  size_t d0TrkNum = d0Itr->nTrackParticles(); //2
658  tracksD0.clear();
659  for( unsigned int it=0; it<d0TrkNum; it++) tracksD0.push_back(d0Itr->trackParticle(it));
660  if (tracksD0.size() != 2 || massesD0.size() != 2 ) {
661  ATH_MSG_INFO("problems with D0 input");
662  }
663 
664  //Leaving for the possible mods in the future
665  //SG::AuxElement::Accessor<xAOD::Vertex_v1::TrackParticleLinks_t> trackAcc( "trackParticleLinks" );
666  //ATH_MSG_INFO("CUSTOM:: "<<*(trackAcc(*d0Itr)).at(0));
667  //ATH_MSG_INFO("CUSTOM2:: "<<tracksD0.at(0)); //-> gives the same result
668 
669  // Apply the user's settings to the fitter
670  // Reset
671  std::unique_ptr<Trk::IVKalState> state (m_iVertexFitter->makeState());
672  // Robustness
673  int robustness = 0;
674  m_iVertexFitter->setRobustness(robustness, *state);
675  // Build up the topology
676  // Vertex list
677  std::vector<Trk::VertexID> vrtList;
678  // D0 vertex
679  Trk::VertexID vID;
680  if (m_constrD0) { //ApplyD0MassConstraint = true
681  if(tagD0) vID = m_iVertexFitter->startVertex(tracksD0,massesD0, *state,mass_d0);
682  else vID = m_iVertexFitter->startVertex(tracksD0,massesD0b, *state,mass_d0);
683  } else {
684  if(tagD0) vID = m_iVertexFitter->startVertex(tracksD0, massesD0,*state);
685  else vID = m_iVertexFitter->startVertex(tracksD0, massesD0b, *state);
686  }
687  vrtList.push_back(vID);
688  // B vertex including mu+pi_soft
689  Trk::VertexID vID2 = m_iVertexFitter->nextVertex(tracksMuPi,massesMuPi,vrtList,*state);
690  if (m_constrMuPi) {
691  std::vector<Trk::VertexID> cnstV;
692  cnstV.clear();
693  if ( !m_iVertexFitter->addMassConstraint(vID2,tracksMuPi,cnstV,*state,m_vtx0MassHypo).isSuccess() ) {
694  ATH_MSG_WARNING("addMassConstraint failed");
695  //return StatusCode::FAILURE;
696  }
697  }
698 
699  // Do the work
700  std::unique_ptr<Trk::VxCascadeInfo> result(m_iVertexFitter->fitCascade(*state));
701 
702  if (result != nullptr) {
703  // reset links to original tracks
704  BPhysPVCascadeTools::PrepareVertexLinks(result.get(), trackContainer);
705  ATH_MSG_DEBUG("storing tracks " << ((result->vertices())[0])->trackParticle(0) << ", "
706  << ((result->vertices())[0])->trackParticle(1) << ", "
707  << ((result->vertices())[1])->trackParticle(0) << ", "
708  << ((result->vertices())[1])->trackParticle(1));
709  // necessary to prevent memory leak
710  result->setSVOwnership(true);
711 
712  // Chi2/DOF cut
713  double bChi2DOF = result->fitChi2()/result->nDoF();
714  ATH_MSG_DEBUG("Candidate chi2/DOF is " << bChi2DOF);
715  bool chi2CutPassed = (m_chi2cut <= 0.0 || bChi2DOF < m_chi2cut);
716 
717  const std::vector< std::vector<TLorentzVector> > &moms = result->getParticleMoms();
718  const std::vector<xAOD::Vertex*> &cascadeVertices = result->vertices();
719 
720  double mass = m_CascadeTools->invariantMass(moms[1]);
721  double DstMassAft = (moms[1][1] + moms[0][0] + moms[0][1]).M(); //pi_soft + D0
722 
723  if(chi2CutPassed) {
724  if (mass >= m_MassLower && mass <= m_MassUpper) {
725  if (m_CascadeTools->pT(moms[1]) > 9500){ //B_pT
726  if (m_CascadeTools->lxy(moms[0],cascadeVertices[0],cascadeVertices[1]) > 0){ //D0_Lxy>0
727  if (DstMassAft < m_DstMassUpperAft){
728 
729  cascadeinfoContainer->push_back(result.release());
730 
731  } //Dst_m < m_DstMassUpperAft
732  } //D0_Lxy>0
733  } //B_pT
734  } else {
735  ATH_MSG_DEBUG("Candidate rejected by the mass cut: mass = "
736  << mass << " != (" << m_MassLower << ", " << m_MassUpper << ")" );
737  } //mass Upper/Lower
738  } //chi2CutPassed
739  } //if (result != nullptr)
740 
741  } //Iterate over D0 vertices
742 
743  } //Iterate over mu+pi_soft vertices
744  ATH_MSG_DEBUG("cascadeinfoContainer size " << cascadeinfoContainer->size());
745  return StatusCode::SUCCESS;
746  }
747 
748 }
749 
python.PyKernel.retrieve
def retrieve(aClass, aKey=None)
Definition: PyKernel.py:110
DerivationFramework::MuPlusDpstCascade::m_D0MassUpper
double m_D0MassUpper
Definition: MuPlusDpstCascade.h:57
xAOD::BPhysHypoHelper::setMass
bool setMass(const float val)
Set given invariant mass and its error.
Definition: BPhysHypoHelper.cxx:52
xAOD::TrackParticle_v1::pt
virtual double pt() const override final
The transverse momentum ( ) of the particle.
Definition: TrackParticle_v1.cxx:75
xAOD::AuxContainerBase::setStore
virtual void setStore(SG::IAuxStore *store) override
Set a different internal store object.
Definition: AuxContainerBase.cxx:197
DerivationFramework::MuPlusDpstCascade::m_vtx0Daug1MassHypo
double m_vtx0Daug1MassHypo
Definition: MuPlusDpstCascade.h:65
V0Tools.h
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Temporary container used until we have I/O for AuxStoreInternal.
Definition: VertexAuxContainer_v1.h:32
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Definition of the current "Vertex container version".
Definition: VertexContainer.h:14
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Definition: MuPlusDpstCascade.h:85
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Definition: MuPlusDpstCascade.h:67
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Definition: MuPlusDpstCascade.h:64
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Definition: BPhysHypoHelper.h:73
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Useful CHECK macro.
Definition: BPhysHelper.h:738
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Definition: MuPlusDpstCascade.h:80
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Definition: AthMsgStreamMacros.h:33
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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
Definition of the current jet auxiliary container.
Definition: VertexAuxContainer.h:19
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Definition: lumiFormat.py:85
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Definition: beamspotman.py:727
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::StatusCode StatusCode
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-physics xAOD helpers.
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Definition: MuPlusDpstCascade.h:74
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Definition: BPhysPVCascadeTools.cxx:204
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Definition: MuPlusDpstCascade.h:78
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Definition: AthCheckMacros.h:40
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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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std::vector< const xAOD::TrackParticle * > TrackBag
Definition: JpsiPlusDpstCascade.cxx:25
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Definition: TrackLeptonConfig.py:23
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THE reconstruction tool.
Definition: ParticleSortingAlg.h:24
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If this object is used as a property, then this should be called during the initialize phase.
Definition: AthToolSupport/AsgDataHandles/Root/VarHandleKey.cxx:103
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Definition: JpsiPlusDpstCascade.cxx:23
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Definition: MuPlusDpstCascade.h:71
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Definition: DataVector.h:795
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Definition: MuPlusDpstCascade.h:49
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Definition: MuPlusDpstCascade.h:91
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Definition: MuPlusDpstCascade.h:54
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Definition: MuPlusDpstCascade.h:63
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Definition: BPhysPVCascadeTools.h:34
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Definition: MuPlusDpstCascade.h:48
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Definition: MuPlusDpstCascade.h:59
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Definition: MuPlusDpstCascade.cxx:488
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Definition: mc.PhPy8EG_A14NNPDF23_gg4l_example.py:21
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Definition: JpsiPlusDpstCascade.cxx:24
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Class describing a Vertex.
Definition: Vertex_v1.h:42
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Definition: AthMsgStreamMacros.h:32
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Definition: MuPlusDpstCascade.h:79
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Definition: MuPlusDpstCascade.h:55
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Definition: MuPlusDpstCascade.h:61
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Definition: MuPlusDpstCascade.h:90
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bool isAvailable(const ELT &e) const
Test to see if this variable exists in the store.
DerivationFramework::MuPlusDpstCascade::initialize
virtual StatusCode initialize() override
Definition: MuPlusDpstCascade.cxx:28
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std::vector< std::string > m_cascadeOutputsKeys
Definition: MuPlusDpstCascade.h:50
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name of the mass hypothesis.
Definition: MuPlusDpstCascade.h:86
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invariant mass error
Definition: BPhysHypoHelper.cxx:57
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virtual double phi() const override final
The azimuthal angle ( ) of the particle (has range to .)
DerivationFramework::MuPlusDpstCascade::m_D0MassLower
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Definition: MuPlusDpstCascade.h:56
DerivationFramework::MuPlusDpstCascade::m_constrMuPi
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Definition: MuPlusDpstCascade.h:73
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