  The transverse momentum distributions of jets produced in p-p, p-\bar p,
d-Au, Au-Au, and Pb-Pb collisions at high energies with different selected
conditions are analyzed by using a multi-source thermal model. The
multi-component (mostly two-component) Erlang distribution used in our
description is in good agreement with the experimental data measured by the
STAR, D0, CDF II, ALICE, ATLAS, and CMS Collaborations. Related parameters are
extracted from the transverse momentum distributions and some information on
different interacting systems are obtained. In the two-component Erlang
distribution, the first component has usually two or more sources which are
contributed by strong scattering interactions between two quarks or more quarks
and gluons, while the second component has mostly two sources which are
contributed by harder head-on scattering between two quarks.
