Allow building electrons from tracks with 0 pixel
Following the discussion today (23/09/2020)
This is for the standard electrons. But is there to support future LRT workflows.
These do not pass any of our std selections, so we had dropped them (AOD space reasons). But seem useful for LRT.
Mentiong @amorley , @mdanning , @goblirsc ,@jpoveda ,@jmaurer , @turra , @gunal , @npetters , @ludovica
I hope I do not miss anyone from the discussion.
The summary is we do slide 7 https://indico.cern.ch/event/957859/contributions/4026454/attachments/2107042/3543706/Egamma_discussion.pdf
BUT the pink box, goes under the blue rather than the red. As we do not want to mix collections (requires C++ changes).
So we keep things Std -> Std
and LRT -> LRT
. Do not need/want to do Std->Std with 1 pixel
and LRT+Std (0 pixel only) -> LRT
.