PhotonVertexHelpers.h

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/*
  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef PhotonVertexSelection_PhotonVertexHelpers_H
#define PhotonVertexSelection_PhotonVertexHelpers_H
 
// EDM includes
#include "xAODTracking/VertexContainerFwd.h"
#include "xAODTracking/TrackParticleFwd.h"
#include "xAODEgamma/PhotonContainer.h"
#include "xAODEgamma/EgammaContainer.h"
#include "xAODEventInfo/EventInfo.h"
 
// ROOT includes
#include "TLorentzVector.h"
 
class ShowerDepthTool;
 
namespace xAOD {
  namespace PVHelpers {
 
    std::pair<float, float> getZCommonAndError(const xAOD::EventInfo *eventInfo,
                                               const xAOD::EgammaContainer *egammas,
                                               float convPtCut = 2e3);
 
    float getVertexSumPt(const xAOD::Vertex *vertex, int power = 1, bool useAux = true);
 
    TLorentzVector getVertexMomentum(const xAOD::Vertex *vertex, bool useAux = true, const std::string& derivationPrefix = "");
 
    const xAOD::Vertex* getHardestVertex(const xAOD::VertexContainer *vertices);
 
    TLorentzVector getTrackAtFirstMeasurement(const xAOD::TrackParticle *tp);
 
    bool passConvSelection(const xAOD::Photon *photon,
                           float convPtCut = 2e3);
 
    bool passConvSelection(const xAOD::Vertex& conversionVertex,
                           size_t i,
                           float convPtCut);
 
  }
}
 
 
#endif // PhotonVertexSelection_PhotonVertexHelpers_H