  An analysis involving the light front variables is performed over the
inclusively produced $\pi^{\pm}$, $K^{\pm}$ and $p(\bar{p})$ in the Pb-Pb
collisions simulated using the UrQMD event generator at $\sqrt{s} = 2.76$ TeV
to study the possible formation of a thermalised medium in these collisions. It
is demonstrated that there exist surfaces defined by constant values of the
light front variable in the phase space of these hadrons which can select a
group of thermalised particles. The temperatures are extracted for each species
and are compared with those obtained from a similar calculation involving the
kinematical and acceptance restrictions which are typically bound to the
collider experiments. It is shown that the analysis is feasible to perform with
the data collected at the ALICE experiment at LHC. The analysis may be
considered as a prototypical study to a similar experimental analysis of the
data from the heavy-ion collisions at RHIC and LHC after implementing the
necessary corrections and calibrations relevant to the experimental
apparatuses.
