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File indexing completed on 2021-02-14 12:49:57

0001 #ifndef CommonTools_Egamma_ConversionTools_h
0002 #define CommonTools_Egamma_ConversionTools_h
0003 
0004 //--------------------------------------------------------------------------------------------------
0005 //
0006 // ConversionTools
0007 //
0008 // Utility to match electrons/photons/tracks to conversions and perform various conversion
0009 // selection criteria.
0010 //
0011 // Matching to photons is by geometrical match with the SuperCluster (defined by angle between
0012 // conversion momentum and vector joining conversion vertex to SuperCluster position)
0013 //
0014 // Matching to tracks and electrons is by reference.
0015 //
0016 // Also implemented here is a "conversion-safe electron veto" for photons through the
0017 // matchedPromptElectron and hasMatchedPromptElectron functions
0018 //
0019 //
0020 // Authors: J.Bendavid
0021 //--------------------------------------------------------------------------------------------------
0022 
0023 #include "DataFormats/Math/interface/Point3D.h"
0024 #include "DataFormats/EgammaCandidates/interface/GsfElectronFwd.h"
0025 #include "DataFormats/EgammaCandidates/interface/Photon.h"
0026 #include "DataFormats/EgammaCandidates/interface/ConversionFwd.h"
0027 #include "DataFormats/TrackReco/interface/TrackFwd.h"
0028 #include "DataFormats/Math/interface/Point3D.h"
0029 #include "DataFormats/GsfTrackReco/interface/GsfTrackFwd.h"
0030 
0031 class ConversionTools {
0032 public:
0033   ConversionTools() {}
0034 
0035   static bool isGoodConversion(const reco::Conversion &conv,
0036                                const math::XYZPoint &beamspot,
0037                                float lxyMin = 2.0,
0038                                float probMin = 1e-6,
0039                                unsigned int nHitsBeforeVtxMax = 1);
0040 
0041   static bool matchesConversion(const reco::GsfElectron &ele,
0042                                 const reco::Conversion &conv,
0043                                 bool allowCkfMatch = true,
0044                                 bool allowAmbiguousGsfMatch = false);
0045   static bool matchesConversion(const reco::GsfElectronCore &eleCore,
0046                                 const reco::Conversion &conv,
0047                                 bool allowCkfMatch = true);
0048   static bool matchesConversion(const reco::SuperCluster &sc,
0049                                 const reco::Conversion &conv,
0050                                 float dRMax = 0.1,
0051                                 float dEtaMax = 999.,
0052                                 float dPhiMax = 999.);
0053   static bool matchesConversion(const edm::RefToBase<reco::Track> &trk, const reco::Conversion &conv);
0054   static bool matchesConversion(const reco::TrackRef &trk, const reco::Conversion &conv);
0055   static bool matchesConversion(const reco::GsfTrackRef &trk, const reco::Conversion &conv);
0056 
0057   static bool hasMatchedConversion(const reco::GsfElectron &ele,
0058                                    const reco::ConversionCollection &convCol,
0059                                    const math::XYZPoint &beamspot,
0060                                    bool allowCkfMatch = true,
0061                                    float lxyMin = 2.0,
0062                                    float probMin = 1e-6,
0063                                    unsigned int nHitsBeforeVtxMax = 0);
0064 
0065   static bool hasMatchedConversion(const reco::TrackRef &trk,
0066                                    const reco::ConversionCollection &convCol,
0067                                    const math::XYZPoint &beamspot,
0068                                    float lxyMin = 2.0,
0069                                    float probMin = 1e-6,
0070                                    unsigned int nHitsBeforeVtxMax = 1);
0071 
0072   static bool hasMatchedConversion(const reco::SuperCluster &sc,
0073                                    const reco::ConversionCollection &convCol,
0074                                    const math::XYZPoint &beamspot,
0075                                    float dRMax = 0.1,
0076                                    float dEtaMax = 999.,
0077                                    float dPhiMax = 999.,
0078                                    float lxyMin = 2.0,
0079                                    float probMin = 1e-6,
0080                                    unsigned int nHitsBeforeVtxMax = 1);
0081 
0082   static reco::Conversion const *matchedConversion(const reco::GsfElectron &ele,
0083                                                    const reco::ConversionCollection &convCol,
0084                                                    const math::XYZPoint &beamspot,
0085                                                    bool allowCkfMatch = true,
0086                                                    float lxyMin = 2.0,
0087                                                    float probMin = 1e-6,
0088                                                    unsigned int nHitsBeforeVtxMax = 0);
0089 
0090   static reco::Conversion const *matchedConversion(const reco::GsfElectronCore &eleCore,
0091                                                    const reco::ConversionCollection &convCol,
0092                                                    const math::XYZPoint &beamspot,
0093                                                    bool allowCkfMatch = true,
0094                                                    float lxyMin = 2.0,
0095                                                    float probMin = 1e-6,
0096                                                    unsigned int nHitsBeforeVtxMax = 0);
0097 
0098   static reco::Conversion const *matchedConversion(const reco::TrackRef &trk,
0099                                                    const reco::ConversionCollection &convCol,
0100                                                    const math::XYZPoint &beamspot,
0101                                                    float lxyMin = 2.0,
0102                                                    float probMin = 1e-6,
0103                                                    unsigned int nHitsBeforeVtxMax = 1);
0104 
0105   static reco::Conversion const *matchedConversion(const reco::SuperCluster &sc,
0106                                                    const reco::ConversionCollection &convCol,
0107                                                    const math::XYZPoint &beamspot,
0108                                                    float dRMax = 0.1,
0109                                                    float dEtaMax = 999.,
0110                                                    float dPhiMax = 999.,
0111                                                    float lxyMin = 2.0,
0112                                                    float probMin = 1e-6,
0113                                                    unsigned int nHitsBeforeVtxMax = 1);
0114 
0115   static bool hasMatchedPromptElectron(const reco::SuperClusterRef &sc,
0116                                        const reco::GsfElectronCollection &eleCol,
0117                                        const reco::ConversionCollection &convCol,
0118                                        const math::XYZPoint &beamspot,
0119                                        bool allowCkfMatch = true,
0120                                        float lxyMin = 2.0,
0121                                        float probMin = 1e-6,
0122                                        unsigned int nHitsBeforeVtxMax = 0);
0123 
0124   static reco::GsfElectron const *matchedPromptElectron(const reco::SuperClusterRef &sc,
0125                                                         const reco::GsfElectronCollection &eleCol,
0126                                                         const reco::ConversionCollection &convCol,
0127                                                         const math::XYZPoint &beamspot,
0128                                                         bool allowCkfMatch = true,
0129                                                         float lxyMin = 2.0,
0130                                                         float probMin = 1e-6,
0131                                                         unsigned int nHitsBeforeVtxMax = 0);
0132 
0133   static float getVtxFitProb(const reco::Conversion *conv);
0134 };
0135 #endif