if(nTrks < fMinTracks) { TooFewTracks(); return fCurrentVertex; }
// Set initial vertex position from ESD
if(nTrks < fMinTracks) { TooFewTracks(); return fCurrentVertex; }
// Set initial vertex position from ESD
// store vertex information in ESD
fCurrentVertex->GetXYZ(vtx);
fCurrentVertex->GetCovMatrix(cvtx);
// store vertex information in ESD
fCurrentVertex->GetXYZ(vtx);
fCurrentVertex->GetCovMatrix(cvtx);