Muon fake rate measurement is too slow

drkovalskyi / Bmm5

BsToMuMu analysis code for CMS experiment at CERN

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Muon fake rate measurement is too slow #2

Closed drkovalskyi closed 3 years ago

drkovalskyi commented 4 years ago

We are looking for K_S with a proper topology in each event unpacking all PFCandidates. It's a very time consuming operation. Need to find a way to speed it up.

Options:

Prescale hadronic K_S. We don't need them all. The down side can be that we may forget about the prescale in the analysis. Probably it's not an issue if we heavily prescale K_S to pipi since the effect will be obvious.
Use V0 computed in RECO. It may not work for pi+muon signature. Need to check what we have.

drkovalskyi commented 3 years ago

In MiniAOD V0s are available only Ks and Lambda, so we have no option but reconstruct it ourselves since we need more control samples.

drkovalskyi commented 3 years ago

NanoAOD with V0 code is just 35% slower compared with plain NanoAOD on Run2018D Charmonium MINIAOD. I think it's a reasonable price to pay.