A unified formalism to study the pseudorapidity spectra in heavy-ion collision

The pseudorapidity distribution of charged hadron over a wide $\eta$ range gives us crucial information about the dynamics of particle production. The constraint by the detector acceptance, particularly at forward rapidities, demands a proper distribution function to extrapolate the pseudorapidity distribution to large $\eta$. In this work, we have proposed a phenomenological model based on the Pearson statistical framework to study the pseudorapidity distribution. We have analyzed and fit data of charged hadrons produced in Pb-Pb collision at 2.76 TeV and Xe-Xe collision at 5.44 TeV using the proposed model.