Missing jet EM fraction requirements in Type-1 MET correction code?

[aminnj]

When recalculating Type-1 corrected MET in this loop:

nanoAOD-tools/python/postprocessing/modules/jme/jetmetUncertainties.py

Line 256 in 6b4870f

for iJet, jet in enumerate(itertools.chain(jets, lowPtJets)):

I don't see that jets are skipped if they have an EM fraction above a threshold, as is done in CMSSW here, where the threshold is defined here to be 0.9.

Is this intentional, or something that needs to be implemented? In principle, this is already doable with the nominal jet collection since there are Jet_chEmEF and Jet_neEmEF branches, but this information is not available for the low pT jets in the CorrT1METJet collection.

Checking on some 2018 data events with a different framework for correction, I find that 0.7% of events will have a MET value that differs by >0.1GeV between applying this EM veto and not applying it.

[aminnj]

Sorry, it is indeed done for the nominal jet collection and I just missed it:

nanoAOD-tools/python/postprocessing/modules/jme/jetmetUncertainties.py

Lines 412 to 417 in 6b4870f

	if jet_pt_L1L2L3 > self.unclEnThreshold and (jet.neEmEF+jet.chEmEF) < 0.9:
	if not ( self.metBranchName == 'METFixEE2017' and 2.65<abs(jet.eta)<3.14 and jet.pt*(1-jet.rawFactor)<50 ): # do not re-correct for jets that aren't included in METv2 recipe
	jet_cosPhi = math.cos(jet.phi)
	jet_sinPhi = math.sin(jet.phi)
	met_px_nom = met_px_nom - (jet_pt_L1L2L3 - jet_pt_L1)*jet_cosPhi
	met_py_nom = met_py_nom - (jet_pt_L1L2L3 - jet_pt_L1)*jet_sinPhi

but it can't be done for CorrT1METJet jets because chEmEF and neEmEF branches aren't available. Are there plans to add them?