The evolution of the multiplicity distribution can be described with the help of master equation.
At the beginning we look at 3rd and 4th factorial moments and their equilibrium values from which central moments and other ratios can be calculated.
Firstly, we study the master equation for the fixed temperature, because we want to know how fast different moments of the multiplicity distribution
approach their equilibrium value. Then we study the situation in which the temperature of the system decrease.
We found out that in the non-equilibrium state, higher factorial moments differ more from their equilibrium values than the lower moments
and that the behaviour of the combination of the central moments depends on the combination we choose.