Minimum-Bias Studies Using the Energy Scan Data from Fermilab's Tevatron Collider

We report on an analysis of the minimum-bias event data (that is, events recorded with the least selective trigger criteria) taken at the Tevatron collider at Fermilab, in particular an energy scan recording collisions at $\sqrt{s}$ = 0.3, 0.9, and 1.96 TeV. This data set represents a rare chance to analyze the energy dependence of several minimum-bias observables: the pseudorapidity ($dN/d\eta$) and transverse momentum ($dN/dP_{T}$) distributions; the distribution of charged-particle multiplicities; and the average transverse momentum vs. charged-particle multiplicity. We present the results of a comparison of these observables with the PYTHIA Monte Carlo simulation.