EPS Figure
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Data on the transverse momentum distribution of charged particles (|eta| < 1) in the "transverse" region for PTJ1 > 2 GeV/c, 5 GeV/c, and 30 GeV/c, where PTJ1 is the transverse momentum of the leading charged jet. The integral of the distribution gives the average number of charged particles in the "transverse region". The data are compared with the QCD Monte-Carlo model predictions of PYTHIA 6.115 ("tuned" version, CTEQ4L, MSTP(82) = 4, PARP(82) = 1.4 GeV/c, PT(hard) > 0 GeV/c). 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)