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trkmcsim duplication per fit hypothesis #297
Description
trkmcsim follows the same structure as the trk branch, plus an extra layer of nesting. So, we have one truth genealogy array per fit hypothesis:
One event:
trk.pdg: [11, -11, 13, -13]
trkmcsim.pdg: [[11, 13, -211, 2212, 11], [11, 13, -211, 2212, 11], [11, 13, -211, 2212, 11], [11, 13, -211, 2212, 11]]
The thing is, the truth genealogy is always the same regardless of the fit hypothesis. Do we need the duplication?
Thanks,
Sam
Activity
AndrewEdmonds11 commentedon Aug 28, 2025
Hi Sam,
Thanks for pointing this out. Yes, there is duplication but I think it will be tricky to remove because there could be instances when that isn't the case. For example, if we have two tracks: one gets a successful fit from all fit hypotheses but the second only gets a successful fit from the electron hypothesis, we might have something like:
which would be easier to handle than:
so we get an easier-to-use branch, at the cost of duplicated data.
If you can think of a way to have both worlds (i.e. an easy-to-use branch and no duplicationof data), then I'm happy to discuss.
I'll leave this issue open so we have it available for the future
Thanks,
Andy