The missing ET significance can be accessed by the MET::significance()
function from CMSSW_3_4_X
onwards for CaloMET and PFMET. It is defined as
where the probabilities are calculated taking into account the uncertainties of all objects used in the calculation. In short, the MET significance is effectively the of the probability that the MET is consistent with a background fluctuation. (code can be found in CaloMET/METAlgorithms).
Here I document the cuts and preselection needed for data analysis.
GR09_R_34X_V3::All
START3X_V16C::All
~apresyan/public/for_freya/runlist_ecalselection.txt
S
) is defined as 0.5*had energy
, while the energy read out by the long fibre (L
) is defined as the total EM energy - S
. HF_S = 0.5* tower.hadEt(); HF_L = tower.emEt()+HF_S; HFalpha = (HF_L-HF_S)/(HF_L+HF_S); reject tower if -0.8<HFalpha<0.99
!isFake() |z|<15 ndof()>=5
count # tracks with quality "highPurity" reject events with #tracks>=10 AND fraction highPurity tracks<0.25
reco
output. outputCommands = cms.untracked.vstring("drop *","keep *_*_*_METSIGNIF","keep *_gtDigis_*_*","keep *_particleFlow_*_*","keep *_offlinePrimaryVertices_*_*","keep *_generalTracks_*_*")
-- FreyaBlekman - 26-Jan-2010