This study explores the inelastic doubly differential transverse momentum spectra of the
primary charged particles, (π + + π − ), (K + + K − ) and (pp̄) as a function of underlying event
√
(UE) at s = 13 T eV . The particle production is measured on the basis of different angular
regions like toward, transverse and away, elucidated with respect to the direction of leading
particle of an event. To study the thermal freeze-out parameters, the non extensive Tsallis
distribution function is used, to extract the temperature Tef f , and chemical potential µ, which
provides a basis to explain the QCD matter. The Tsallis distribution function clearly describes
transverse momentum spectra in pseudorapidity region of |η| < 0.8. The best fit corresponds to
minimum χ2 /ndf value for the transverse momentum distribution. It is observed that effective
temperature Tef f changes from away to towards and forward region.