Float precision in NanoAOD production #1
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Apr 2, 2023
…_fix_withpuppiproducerfix Make photon protection for existing weights an option
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The float precision of some variables - especially some generator-level variables - is not sufficient for a MC production with some modified physics parameters.
For a four-vector some default values seem to be defined, at least according to this snippet:
cmssw/PhysicsTools/NanoAOD/python/common_cff.py
Line 43 in 04a8451
These values are:
precision=10precision=-1precision=12It has to be checked if the following variables are affected by this issue. If necessary the float precision has to be increased:
GenParticlecollection, especially electrons, muons, tau leptons and Higgs bosonsMETcollection/collections (not only pt and phi but also the covariance matrix elements)