  Transverse momentum $p_T$ spectra of final state particles produced in high
energy heavy-ion collision can be divided into two distinct regions based on
the difference in the underlying particle production process. We have provided
a unified formalism to explain both low- and high-$p_T$ regime of spectra in a
consistent manner. The $p_T$ spectra of final state particles produced at RHIC
and LHC energies have been analysed using unified formalism to test its
applicability at different energies, and a good agreement with the data is
obtained across all energies. Further, the prospect of extracting the elliptic
flow coefficient directly from the transverse momentum spectra is explored.
