Abstract
A thermal-model analysis of particle production of $p$-$p$ collisions at $\sqrt{s}=17$ GeV using the latest available data is presented. The sensitivity of model parameters on data selections and model assumptions is studied. The system-size dependence of thermal parameters and recent differences in the statistical model analysis of $p$-$p$ collisions at the super proton synchrotron are discussed. It is shown that the chemical freeze-out temperature and strangeness undersaturation factor depend strongly on kaon yields, which, at present, are still not well known experimentally. Excluding the $\ensuremath{\phi}$ meson and using data that are in agreement with the overall trend, it is rather unlikely that the chemical decoupling temperature in $p$-$p$ collisions exceeds significantly that extracted from central heavy-ion collisions.
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