The energy dependence of the inverse slope parameter $T(K^+)$ of $p_T$ spectra at mid-rapidity of positively charged $K$ mesons for pp. The data used for comparison, other than Ar+Sc, are published in
Midrapidity (|y| < 0.1) transverse momentum spectra for (a) π+ in Au+Au collisions at √sNN = 19.6 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity