Ws are not always included in pdgid

[smpalome]

I filled a histogramm with the number of Ws per event and there are many events with 0 or 1 Ws which is odd since we need to have atleast 2 in ttbar events.

ws.pdf

[kreczko]

As discussed on slack, the culprit is
https://github.com/BristolTopGroup/NTupleProduction/blob/master/python/BristolNTuple_GenParticles_cfi.py#L7
We need to store more particles. How many? No idea. Probably worth having a test script that looks at all genParticles in MiniAOD and tests which is the highest index that we still get a W.

[EmyrClement]

Also check what genParticles are in the miniAOD

https://twiki.cern.ch/twiki/bin/view/CMSPublic/WorkBookMiniAOD2015#MC_Truth

Also, there's 50-100 per event in prunedGenParticles, so just set it to
50 or 100.

On 24/11/2015 16:38, Luke Kreczko wrote:

As discussed on slack, the culprit is
https://github.com/BristolTopGroup/NTupleProduction/blob/master/python/BristolNTuple_GenParticles_cfi.py#L7
We need to store more particles. How many? No idea. Probably worth
having a test script that looks at all genParticles in MiniAOD and
tests which is the highest index that we still get a W.

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