EPS Figure
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The average number of "toward" charged particles (PT > 0.5 GeV/c, |eta| < 1, including chgjet1) as a function of the transverse momentum of the leading charged jet. Each point corresponds to the <Nchg> in a 1 GeV/c bin. The data are compared with the QCD Monte-Carlo model predictions of ISAJET 7.32, with its default parameters and PT(hard) > 3 GeV/c. The predictions of ISAJET are divided into three categories: charged particles that arise from the break-up of the beam particles ("beam-beam remnants"), charged particles that arise from initial-state radiation, and charged particles that result from the outgoing jets plus final-state radiation. The Monte-Carlo model predictions have been corrected for the CTC track finding efficiency (8% of the charged tracks are, on the average, removed) and have an uncertainty (statistical plus systematic) of about 5%. (Return)