We'll eventually likely want to run b-tagging before we have a primary vertex collection to work with. This makes the collection optional. Instead it will take the primary vertex z position as the center of the beamspot.
Edited by Dan Guest
We'll eventually likely want to run b-tagging before we have a primary vertex collection to work with. This makes the collection optional. Instead it will take the primary vertex z position as the center of the beamspot.