An analysis of some global properties of the events recorded with the minimum bias trigger, studied as a function of the same reference variable is described. Using CTC tracks in the eta region abs(eta)<1, the normalized mean multiplicity, the normalized mean number of V0 (K0s + Lambda) and the strength of the short range pseudorapidity correlation have been studied as a function of the event average Pt. Comparison have been made between the two available center of mass energies 1800 and 630 GeV and also with a sample of events recorded with Et_20 and Et_50 triggers. The results show that all of the above quantities rise with the increasing of the event average pt up to a maximum followed by a less steep descent or a flattening at mean event pt of about 1 GeV/c. This shape is nicely reproduced at the two energies, showing a very good scaling behaviour of these correlations. In the high Et data, whose mean event pt are mainly above 1 GeV/c, the above variables stay flat or increase smoothly when the average event pt increases.

Blessed plots :

• cdf3803_fig2.ps Normalized charged event multiplicity versus mean event pt good CTC tracks have been used, only single interaction events have been kept data are from the run 1A Min Bias sample.
• cdf3803_fig4.ps Same plot as above , with the Jet sample behaviour superimposed.
• cdf3803_fig5.ps Comparison between 630 GeV (run 1C) and 1800 GeV (run 1A) data in the same variables.
• cdf3803_fig7.ps The same correlation plot is compared with the normalized charged event multiplicity versus mean event Et, obtained from 1989 data using the VTPC multiplicity.
• cdf3803_fig9.ps Short range pseudorapidity correlation strenght vs mean event pt, 630 and 1800 GeV.
• cdf3803_fig10.ps Same as above, 1800 GeV data compared to the Jet sample.
• cdf3803_fig11.ps Number of strange particles vs mean event pt, 630 and 1800 GeV data.
• cdf3803_fig12.ps Comparison between Min Bias and Jet data in the same variables as above.

Last updated Aug 25, 1996.