InDetV0FinderTool.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
/***************************************************************************
                          InDetV0FinderTool.h  -  Description
                             -------------------
    begin   : 30-11-2014
    authors : Evelina Bouhova-Thacker (Lancater University)
    email   : e.bouhova@cern.ch
    changes :
 
 ***************************************************************************/
 
#ifndef INDETV0FINDERTOOL_H
#define INDETV0FINDERTOOL_H
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "GaudiKernel/ToolHandle.h"
#include "xAODTracking/VertexContainer.h"
#include "xAODTracking/TrackParticleContainer.h"
#include "StoreGate/WriteDecorHandleKey.h"
#include "StoreGate/ReadDecorHandleKey.h"
#include "StoreGate/ReadDecorHandleKeyArray.h"
#include "xAODEventInfo/EventInfo.h"
#include "BeamSpotConditionsData/BeamSpotData.h"
#include "TrkParameters/TrackParameters.h"
#include "GeoPrimitives/GeoPrimitives.h" //Needed for Amg::Vector3D
#include <atomic>
 
#include "InDetConversionFinderTools/VertexPointEstimator.h"
#include "ITrackToVertex/ITrackToVertex.h"
#include "TrkExInterfaces/IExtrapolator.h"
#include "TrkToolInterfaces/ITrackSelectorTool.h"
#include "TrkVertexFitterInterfaces/IVertexFitter.h"
#include "MVAUtils/BDT.h"
#include <TTree.h>
#include <TFile.h>
#include "PathResolver/PathResolver.h"

 
 
/* Forward declarations */
 
namespace Trk
{
  class TrkV0VertexFitter;
  class V0Tools;
}
 
namespace InDet
{
  static const InterfaceID IID_InDetV0FinderTool("InDetV0FinderTool", 1, 0);
 
  class InDetV0FinderTool:  public AthAlgTool
  {
  public:
    InDetV0FinderTool(const std::string& t, const std::string& n, const IInterface*  p);
    ~InDetV0FinderTool();
    StatusCode initialize();
    StatusCode finalize();
 
    static const InterfaceID& interfaceID() { return IID_InDetV0FinderTool;}
 
    StatusCode performSearch(xAOD::VertexContainer* v0Container,
                             xAOD::VertexContainer* ksContainer,
                             xAOD::VertexContainer* laContainer,
                             xAOD::VertexContainer* lbContainer,
                             const xAOD::Vertex* vertex,
                 const xAOD::VertexContainer* vertColl, const EventContext& ctx
                 ) const;
 
  //protected:
  private:
    SG::ReadHandleKey<xAOD::TrackParticleContainer> m_trackParticleKey { this, "TrackParticleCollection", "InDetTrackParticles",
                                                                         "key for retrieval of TrackParticles" };
 
    PublicToolHandle<Trk::IVertexFitter> m_iVertexFitter {
      this, "VertexFitterTool", "Trk::V0VertexFitter"};
    PublicToolHandle<Trk::IVertexFitter> m_iVKVertexFitter{
      this, "VKVertexFitterTool", "Trk::TrkVKalVrtFitter"};
    PublicToolHandle<Trk::IVertexFitter> m_iKshortFitter{
      this, "KshortFitterTool", "Trk::TrkVKalVrtFitter"};
    PublicToolHandle<Trk::IVertexFitter> m_iLambdaFitter{
      this, "LambdaFitterTool", "Trk::TrkVKalVrtFitter"};
    PublicToolHandle<Trk::IVertexFitter> m_iLambdabarFitter{
      this, "LambdabarFitterTool", "Trk::TrkVKalVrtFitter"};
    PublicToolHandle<Trk::IVertexFitter> m_iGammaFitter{
      this, "GammaFitterTool", "Trk::TrkVKalVrtFitter"};
    PublicToolHandle<Trk::V0Tools> m_V0Tools{
      this, "V0Tools", "Trk::V0Tools"};
    PublicToolHandle<Reco::ITrackToVertex> m_trackToVertexTool{
      this, "TrackToVertexTool", "Reco::TrackToVertex"};
    PublicToolHandle<Trk::ITrackSelectorTool> m_trkSelector{
      this, "TrackSelectorTool", "InDet::TrackSelectorTool"};
    PublicToolHandle<InDet::VertexPointEstimator> m_vertexEstimator{
      this, "VertexPointEstimator", "InDet::VertexPointEstimator"};
    PublicToolHandle<Trk::IExtrapolator> m_extrapolator{
      this, "Extrapolator", "Trk::Extrapolator"};
 
 
    BooleanProperty m_doSimpleV0{this, "doSimpleV0", false};            
    BooleanProperty m_useorigin{this, "useorigin", true};               
    BooleanProperty m_samesign{this, "AddSameSign", false};             
    BooleanProperty m_pv{this, "trkSelPV", false};                      
    BooleanProperty m_use_vertColl{this, "useVertexCollection", false}; 
    BooleanProperty m_useTRTplusTRT{this, "useTRTplusTRT", false};      
    BooleanProperty m_useTRTplusSi{this, "useTRTplusSi", false};        
    BooleanProperty m_useV0Fitter{this, "useV0Fitter", false};          
    BooleanProperty m_use_innerPixHits{this, "use_innerPixHits", false}; 
    BooleanProperty m_useBDT{this, "useBDT", false};                     
    BooleanProperty m_useTrkSel{this, "use_TrackSelector", true};      
    
    IntegerProperty m_masses{this, "masses", 1};                        
    DoubleProperty m_masspi{this, "masspi", ParticleConstants::chargedPionMassInMeV};                    
    DoubleProperty m_massp{this, "massp", ParticleConstants::protonMassInMeV};                     
    DoubleProperty m_masse{this, "masse", ParticleConstants::electronMassInMeV};                    
    DoubleProperty m_massK0S{this, "massK0S", ParticleConstants::KZeroMassInMeV};                 
    DoubleProperty m_massLambda{this, "massLambda", ParticleConstants::lambdaMassInMeV};           
    DoubleProperty m_ptTRT{this, "ptTRT", 700.};                        
    DoubleProperty m_maxsxy{this, "maxsxy", 1000.};                     
    DoubleProperty m_uksmin{this, "uksmin", 400.};                      
    DoubleProperty m_uksmax{this, "uksmax", 600.};                      
    DoubleProperty m_ulamin{this, "ulamin", 1000.};                     
    DoubleProperty m_ulamax{this, "ulamax", 1200.};                     
    DoubleProperty m_ksmin{this, "ksmin", 400.};                        
    DoubleProperty m_ksmax{this, "ksmax", 600.};                        
    DoubleProperty m_lamin{this, "lamin", 1000.};                       
    DoubleProperty m_lamax{this, "lamax", 1200.};                       
    DoubleProperty m_errmass{this, "errmass", 100.};                    
    DoubleProperty m_minVertProb{this, "minVertProb", 0.0001};          
    DoubleProperty m_minConstrVertProb{this, "minConstrVertProb", 0.0001}; 
    DoubleProperty m_d0_cut{this, "d0_cut", 2.};                        
    DoubleProperty m_max_d0_cut{this, "max_d0_cut", 999999.};           
    DoubleProperty m_max_z0_cut{this, "max_z0_cut", 999999.};           
    DoubleProperty m_vert_lxy_sig{this, "vert_lxy_sig", 2.};            
    DoubleProperty m_vert_lxy_cut{this, "vert_lxy_cut", 500.};          
    DoubleProperty m_vert_a0xy_cut{this, "vert_a0xy_cut", 3.};          
    DoubleProperty m_vert_a0z_cut{this, "vert_a0z_cut", 15.};           
    DoubleProperty m_vert_cos_cut{this, "vert_cos_cut", 0.};            
    DoubleProperty m_BDTCut{this, "BDTCut", -1};                        
 
    StringProperty m_BDTFile{this, "BDTFile", "XGBModelBetterVertex.root"};    
 
 
    mutable std::atomic<unsigned int>  m_events_processed{};
    mutable std::atomic<unsigned int>  m_V0s_stored{};
    mutable std::atomic<unsigned int>  m_Kshort_stored{};
    mutable std::atomic<unsigned int>  m_Lambda_stored{};
    mutable std::atomic<unsigned int>  m_Lambdabar_stored{};
    mutable std::atomic<unsigned int>  m_Gamma_stored{};
 
 
    void SGError(const std::string& errService) const;
 
    static double invariantMass(const Trk::TrackParameters* per1, const Trk::TrackParameters* per2, double m1, double m2) ;
 
    bool doFit(const xAOD::TrackParticle* track1, const xAOD::TrackParticle* track2, Amg::Vector3D &startingPoint, const EventContext& ctx) const;
 
    bool d0Pass(const xAOD::TrackParticle* track1, const xAOD::TrackParticle* track2, const xAOD::VertexContainer * vertColl, const EventContext& ctx) const;
    bool d0Pass(const xAOD::TrackParticle* track1, const xAOD::VertexContainer * vertColl, const EventContext& ctx) const;
    bool d0Pass(const xAOD::TrackParticle* track1, const xAOD::Vertex * vertex, const EventContext& ctx) const;
    bool d0Pass(const xAOD::TrackParticle* track1, const Amg::Vector3D& vertex, const EventContext& ctx) const;
 
    bool pointAtVertex(const xAOD::Vertex* v0, const xAOD::Vertex* PV, float &score) const;
    bool pointAtVertexColl(xAOD::Vertex* v0, const xAOD::VertexContainer * vertColl, float &score) const;
 
    bool doMassFit(xAOD::Vertex* vxCandidate, int pdgID) const;
 
    std::unique_ptr<xAOD::Vertex> massFit(const EventContext& ctx, int pdgID, const std::vector<const xAOD::TrackParticle*> &pairV0, const Amg::Vector3D &vertex) const;
 
    const Trk::TrkV0VertexFitter* m_concreteVertexFitter = nullptr;
 
    SG::ReadHandleKey<xAOD::VertexContainer> m_vertexKey { this, "VertexContainer", "PrimaryVertices",
                                                       "primary vertex container" };
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_v0LinksDecorkeyks;
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_v0LinksDecorkeylb;
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_v0LinksDecorkeylbb;
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_v0_ksLinksDecorkey;
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_v0_laLinksDecorkey;
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_v0_lbLinksDecorkey;
 
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_mDecor_gfit;
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_mDecor_gmass;
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_mDecor_gmasserr;
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_mDecor_gprob;
 
    SG::WriteDecorHandleKey<xAOD::VertexContainer> m_v0_BDTScore;
 
    std::unique_ptr<MVAUtils::BDT> m_BDT;
 
    SG::ReadHandleKey<xAOD::EventInfo> m_eventInfo_key{this, "EventInfo", "EventInfo", "Input event information"};
    SG::ReadCondHandleKey<InDet::BeamSpotData> m_beamSpotKey { this, "BeamSpotKey", "BeamSpotData", "SG key for beam spot" };
    SG::ReadDecorHandleKeyArray<xAOD::EventInfo> m_beamSpotDecoKey{this, "BeamSpotDecoKeys", m_eventInfo_key, {"beamPosX", "beamPosY", "beamPosZ"}, "Add the scheduler dependencies on the beamspot information"};
    Gaudi::Property<bool>       m_useBeamSpotCond { this, "UseBeamSpotCond", false };
    // V0 candidate output container name (same calling alg)
    Gaudi::Property<std::string>       m_v0Key { this, "V0ContainerName", "V0Candidates", "V0 container name (same calling alg)" };
    Gaudi::Property<std::string>       m_ksKey { this, "KshortContainerName", "KshortCandidates", "Ks container name (same calling alg)" };
    Gaudi::Property<std::string>       m_laKey { this, "LambdaContainerName", "LambdaCandidates",
                                                              "Lambda container name (same calling alg)" };
    Gaudi::Property<std::string>       m_lbKey { this, "LambdabarContainerName", "LambdabarCandidates", 
                                                              "Lambdabar container name (same calling alg)" };
    Gaudi::Property<int>       m_maxPV { this, "MaxPV", 999999 };
    SG::ReadHandleKeyArray<xAOD::TrackParticleContainer> m_RelinkContainers{this, "RelinkTracks", {}, "Track Containers if they need to be relinked through indirect use" };
    ElementLink<xAOD::TrackParticleContainer> makeLink(const xAOD::TrackParticle*, const std::vector<const xAOD::TrackParticleContainer*>&) const;
 
  };
 
}//end of namespace InDet
 
#endif