the system to rule out any possible effect of non-equilibrium phenomena or the effect of gluon saturation, which is expected at higher collision energies, to play a role at LHC energies.

The pseudo(rapidity) density of transverse energy, $dE_T/d\eta(y)$ is an approximate Lorentz invariant measure of the energy distribution and is a measure of the explosiveness of the collision. This is an important observable, as it is the energy of the produced particles in the transverse phase space, which was completely empty before the collision. The energy of the incoming nuclei in the longitudinal direction is converted to the energy of the produced secondaries. The midrapidity measurement of $dE_T/dy$ is related to the initial energy density of the system. In longitudinal boost invariant Bjorken hydrodynamics, this helps in making a direct comparison with the lattice QCD prediction of energy density for a deconfinement transition and thereby giving a first hint of a possible partonic medium. The study of the centrality and collision energy dependence of $dE_T/dy(\eta)$ sheds light on possible freeze-out criteria in heavy-ion collisions [@Cleymans:2007uk].

Recently using an excluded-volume statistical hadron gas model (EV-SHGM) with the longitudinal flow, we have studied the limiting fragmentation (LF) phenomenon in the rapidity spectra 