JpsiPlus1Track.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
// ****************************************************************************
// ----------------------------------------------------------------------------
// JpsiFinder header file
//
// James Catmore <James.Catmore@cern.ch>
 
// ----------------------------------------------------------------------------
// ****************************************************************************
#ifndef JPSIPLUS1TRACK_H
#define JPSIPLUS1TRACK_H
#include "AthenaBaseComps/AthAlgTool.h"
#include "GaudiKernel/ToolHandle.h"
#include "xAODTracking/TrackParticleFwd.h"
#include "xAODMuon/MuonContainer.h"
#include "xAODTracking/VertexFwd.h"
#include "xAODTracking/VertexContainerFwd.h"
#include "xAODEgamma/ElectronContainerFwd.h"
#include <vector>
#include <string>
#include <bitset>
#include "JpsiUpsilonTools/ICandidateSearch.h"
#include "StoreGate/ReadHandleKey.h"
 
namespace Trk {
    class IVertexFitter;
    class TrkVKalVrtFitter;
    class ITrackSelectorTool;
}
namespace InDet { class VertexPointEstimator; }
 
namespace Analysis {
    
    static const InterfaceID IID_JpsiPlus1Track("JpsiPlus1Track", 1, 0);
    
    class JpsiPlus1Track:  public Analysis::ICandidateSearch, public AthAlgTool
    {
    public:
        JpsiPlus1Track(const std::string& t, const std::string& n, const IInterface*  p);
        ~JpsiPlus1Track();
        virtual StatusCode initialize() override;
        
        static const InterfaceID& interfaceID() { return IID_JpsiPlus1Track;};
 
      
        //-------------------------------------------------------------------------------------
        //Doing Calculation and inline functions
        virtual StatusCode performSearch(const EventContext& ctx , xAOD::VertexContainer&) const override;
        std::unique_ptr<xAOD::Vertex> fit(const EventContext& ctx, const std::vector<const xAOD::TrackParticle*>&, const xAOD::TrackParticleContainer*, const xAOD::TrackParticleContainer*) const;
        //-------------------------------------------------------------------------------------
        
    private:
        bool m_piMassHyp{};
        bool m_kMassHyp{};
        double m_trkThresholdPt{};
        double m_trkMaxEta{};
        double m_BThresholdPt{};
        double m_BMassUpper{};
        double m_BMassLower{};
        SG::ReadHandleKey<xAOD::VertexContainer> m_jpsiCollectionKey;
        double m_jpsiMassUpper{};
        double m_jpsiMassLower{};
        SG::ReadHandleKey<xAOD::TrackParticleContainer> m_TrkParticleCollection;
        SG::ReadHandleKey<xAOD::MuonContainer> m_MuonsUsedInJpsi;
        bool m_excludeJpsiMuonsOnly{};
        bool m_excludeCrossJpsiTracks{}; //Added by Matteo Bedognetti
        ToolHandle < Trk::IVertexFitter > m_iVertexFitter;
        ToolHandle < Trk::ITrackSelectorTool > m_trkSelector;
        Trk::TrkVKalVrtFitter* m_VKVFitter{};
        bool m_useMassConst{};
        double m_altMassConst{};
        double m_chi2cut{};
        double m_trkTrippletMassUpper{};
        double m_trkTrippletMassLower{};
        double m_trkTrippletPt       {};
        double m_trkDeltaZ           {};
        int m_requiredNMuons=0;
        int m_requiredNElectrons=0;
        std::vector<double> m_muonMasses;
        std::vector<int>    m_useGSFTrackIndices;
        SG::ReadHandleKey<xAOD::TrackParticleContainer>   m_TrkParticleGSFCollection;
        std::bitset<3>      m_useGSFTrack;
        SG::ReadHandleKey<xAOD::ElectronContainer>    m_electronCollectionKey;
        bool m_skipNoElectron = false;
        size_t m_candidateLimit{};
 
    };
} // end of namespace
#endif