Hadronic multiplicity distribution and dynamical fluctuations under QGP phase transitions

Hadronic multiplicity distributions in small bins an studied within the Gin zburg-Landau description for quark-hadron phase transitions. Direct compari son of the distributions with Poisson ones (with the same averages) is made in the light of dynamical factors d(q) far the distributions and ratios D- q = d(q)/d(l). Scaling behavior between D-q's is found, which can be used t o detect the formation of quark-gluon plasma. The same method can be used i n the analysis of other processes without phase transition.