=== Missing Et objects ===

==== Reco ====

All missing Et objects that are available are on this webpage: https://twiki.cern.ch/twiki/bin/view/AtlasProtected/EtMissObjects

General schema: http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/JETS/EMISREC/MET_schema_2.pdf

The default MissingEt object is MET_EtMissRefFinal, which is described in detail here:
 * https://twiki.cern.ch/twiki/bin/view/AtlasProtected/EtMissRefFinal
 * http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/JETS/EMISREC/RefFinal_schema_2.pdf

For some purposes it might be useful to use MET_Final, described here:
 * https://twiki.cern.ch/twiki/bin/view/AtlasProtected/EtMissFinal

==== Truth ====

MissingEtTruth objects:

    * Int = all interacting particles till abs(eta) <= 5 (muons excluded)
    * NonInt = all non interacting particles (neutrinos and SUSY)
    * IntCentral = interacting particles in abs(eta) <= 3.2 (muons excluded)
    * IntFwd = interacting particles in 3.2<abs(eta)<=5 (muons excluded)
    * IntOutCover = interacting particles with abs(eta) > 5 (muons excluded)
    * Muons = all truth muons 

==== fixing muon term in r635_t35 samples ====

problems described here: http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/JETS/EMISREC/muon_allbug_14.txt

solution: https://twiki.cern.ch/twiki/bin/view/AtlasProtected/MetCorrectionForHiggsWG#How_to_Apply_the_Fix_for_15_3_0