  A detailed study of event by event fluctuation of maximum particle density of
the produced particles in narrow pseudo-rapidity interval in terms of the
scaled variance {\omega} has been carried out for 16O-AgBr, 28Si-AgBr and
32S-AgBr interactions at an incident momentum of 4.5 AGeV/c. For all the
interactions the values of scaled variance are found to be greater than zero
indicating the presence of strong event by event fluctuation of maximum
particle density values in the multiparticle production process. The event by
event fluctuations are found to decrease with the increase of pseudo-rapidity
interval. Experimental analysis has been compared with the results obtained
from the analysis of events simulated by the Ultra Relativistic Quantum
Molecular Dynamics (UrQMD) model. UrQMD model could not replicate the
experimental results.
