Medium effects of charged-hadron production in p+Pb and Pb+Pb collisions at LHC energies using modified Tsallis distribution

The transverse momentum ($p_T$) spectra of charged hadrons in $p+p$, $p+Pb$ and $Pb+Pb$ collisions at $\sqrt {s_{NN}} = 5.02$ TeV are presented here within the rapidity range of $-2.5<y<2.0$. We study the medium effects, which is produced by heavy ion collisions, on the behaviour of charged hadrons, by using a phenomenological fit function. These effects are attributed to two main factors: the transverse collective flow and the the energy loss of charged hadrons due to multiple scatterings. We observe the transverse collective flow at low and intermediate $p_T$ region and the energy loss at high $p_T$ region. Here we take all the published data from the ATLAS collaboration.