S.D. Ellis: CDF/DO/Theory Jet Workshop  12/16/02
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The trick with JEF is defining observables, e.g.
•The probability distribution (for a CDF type rapidity acceptance and CDF ET = E sinq definition) is





i.e., probabilities µ area/pR2 
•The corresponding number of jets (JEFs) above ET,min, per event, is