Speaker
Description
At critical point a system undergoing phase transition is characterized by large fluctuations in the observables. Fluctuation study is thus one of the important techniques to explore phases of the QCD matter and to search for the critical end point of hadron-quark or quark-hadron phase boundary. Scaling properties of the multiplicity fluctuations of hadrons produced in the high energy heavy ion collisions may reveal the features of quark-hadron phase transition and also the particle production mechanism. Using scaling exponent obtained from the normalized factorial moments of the number of charged hadrons in the two dimensional ($\eta,\phi$) phase space, the system created in these collisions can be characterized quantitatively. Within the framework of Ginzburg-Landau (GL) formalism
for second order phase transition and for the two-dimensional Ising model simulated for quark-hadron phase transition a universal value of scaling exponent ($\nu$) is obtained as $1.316 \pm 0.012 $. Here we will present observations and results from the analysis performed for charged particle multiplicity distributions obtained from Xe-Xe collisions at $\sqrt{s_{NN}} = 5.44 $ TeV with the string melting mode of the AMPT model. Observations, results on the behaviour of the normalized factorial moments and the dependence of the scaling exponent on the transverse momentum bin width will be presented.
