Event-by-Event Fluctuations of Transverse Momentum in Elementary Collisions at 250 GeV/c

We present a study of event-by-event fluctuations of transverse momentum in $\pi^{+}\p$ and $\K^{+}\p$ collisions at 250 GeV/$c$ and the corresponding PYTHIA Monte Carlo results for $\pi^{+}\p$ collisions. The dependence of $\Phi_{p_{t}}$ on event and particle variables are investigated in detail. We find that $\Phi_{p_t}$ are all negative for different average transverse momentum per event sample. The $<p_{t} >_N \sim N$ correlation may not be the only origin of $\Phi_{p_{t}}$.