Entropy Analysis in $\pi^{+}\rp$ and $\rK^{+}\rp$ Collisions at   $\sqrt{s}=22$ GeV
  The entropy properties are analyzed by Ma's coincidence method in $\pi^{+}\rp$ and $\rK^{+}\rp$ collisions of the NA22 experiment at 250 GeV/$c$ incident momentum. By using the R\'{e}nyi entropies, we test the scaling law and additivity properties in rapidity space. The behavior of the R\'{e}nyi entropies as a function of the average number of particles is investigated. The results are compared with those from the {\sc Pythia} Monte Carlo event generator. 
NA22 Collaboration: M.R. Atayan, et al