Check theory weights for alternative ttbb samples
The theory uncertainty weights, when present, do not all make sense for the alternative ttbb samples:
- aMC@NLO tt+jets FxFx:
- ME QCD scales asymmetric
- PDF not present
- aMC@NLO ttbb 4FS: PDF asymmetric
- Sherpa ttbb 4FS:
- ME QCD, PDF weights not present
- PS nonsensical
- Herwig: PS nonsensical
In some cases, it is probably only because we are not using the correct weights, and we should understand which to use and fix the code.
In others, it is possible that the weights are present at miniAOD level but are not stored correctly by NanoAOD. We should check if that is the case, and possibly produce fixed NanoGEN samples ourselves (no need for a full NanoAOD).