Scaling, large-PTdistribution, and fireball motion

Fireball properties have been investigated using results of previous analyses of inclusive $p-p$ data in terms of a Bose-type distribution modified by a scaling parameter. A discussion is presented on the relation between the scaling parameter and the longitudinal velocity of the fireball. It is found that the transverse motion may account for large-$P_T$ distributions at 90° c.m. angle and that this motion is not detectable for $P_T<1.5\mathrm{}$ GeV/c. The fireball mass is found to increase as ${({\gamma }_{\mathrm{c}.\mathrm{m}.\mathrm{}}-1)}^{\frac{1}{2}}$, ${\gamma }_{\mathrm{c}.\mathrm{m}.\mathrm{}}$ being the Lorentz transformation factor from lab to c.m. system.