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• INDEPENDENT FRAGMENTATION (IF)

• Assume fragmentation of any system of partons can be

• described as an incoherent sum of independent fragmentation

• procedures for each parton separately

• * FIELD-FEYNMAN MODEL (1978)

• sharing of E ,p given

• by probability distribution f(w)

• w is the fraction

• w = E + pL of the jet EUROJET/COJETS

• EURODEC/ISAJET

• Energy, color, flavor, momentum are not exactly conserved (not done step by step)

• Lorentz-invariance broken

• e-e+ data disfavors this model but in the case of hadronic physics this still survives ... (ISAJET)