Canonical suppression in microscopic transport models
  We demonstrate the occurrence of canonical suppression associated with the conservation of an U(1)-charge in current transport models. For this study a pion gas is simulated within two different transport approaches by incorporating inelastic and volume-limited collisions $\pi\pi\leftrightarrow K\bar{K}$ for the production of kaon pairs. Both descriptions can dynamically account for the suppression in the yields of rare strange particles in a limited box, being in full accordance with a canonical statistical description. 
O. Fochler, S. Vogel, M. Bleicher, C. Greiner, P. Koch-Steinheimer, Z.   Xu