Average fraction of jet momentum carried by highP⊥ leading hadrons

The average fraction, , of jet momentum carried by the associated charged leading hadron has been determined in the reactionp+N→h1+h2+X whereN is the target nucleon;h1,h2 are the leading particles of two jets produced at highP⊥. An 800 GeV/c proton beam and 4 nuclear targets: Be, Al, Fe and W were used. The distributions agree with the QCD-parton model predictions for single independent protonnucleon scattering and independent fragmentation process.