StEvent - tracks, primary vertex and nodes
So far we have two flavours: global tracks and primary tracks
global tracks have no vertex constraint (directly from tpt)
primary tracks are tracks refitted with the assumption that they come from the primary vertex. The vertex is used in the fit.
A node contains both, since they belong together
- from the node you can access both (if present)
- each track knows to which node it belongs
The primary vertex has a list of daughter tracks: these are all primary tracks. If you are only interested in primary tracks forget about the nodes.