std::pair< float, float > getZCommonAndError(const xAOD::EventInfo *eventInfo, const xAOD::EgammaContainer *egammas, float convPtCut=2e3)
Return zCommon and zCommonError.
TLorentzVector getVertexMomentum(const xAOD::Vertex *vertex, bool useAux=true, const std::string &derivationPrefix="")
Return vector sum of tracks associated with vertex (from auxdata if available and useAux = true)
Class describing a TrackParticle.