Dariusz Prorok

Multiplicities in Au-Au and Cu-Cu collisions at $sqrt{s_{NN}} = 62.4$ and $200$ GeV

Likelihood ratio tests are performed for the hypothesis that charged-particle multiplicities measured in Au-Au and Cu-Cu collisions at $sqrt{s_{NN}} = 62.4$ and 200 GeV are distributed according to the negative binomial form. Results indicate that the hypothesis should be rejected in the all cases of PHENIX-RHIC measurements. Possible explanations of that and of the disagreement with the least-squares fitting method are given.