  We study the charged pion transverse momentum ($p_T$) spectra in $p$+$p$
collisions as a function of collision energy $\sqrt{s}$ and event multiplicity
using Tsallis distribution. This study gives an insight of the pion production
process in $p+p$ collisions. The study covers pion spectra measured in $p+p$
collisions at SPS energies (6.27-17.27 GeV), RHIC energies (62.4 GeV and 200
GeV) and LHC energies (900 GeV, 2.76 TeV and 7 TeV). The Tsallis parameters
have been obtained and parameterized as a function of $\sqrt{s}$. The study
suggests that as we move to higher energy more and more hard processes
contribute to the spectra. We also study the charged pion spectra for different
event multiplicities in $p$+$p$ collisions for LHC energies using Tsallis
distribution. The variation of the Tsallis parameters as a function of event
multiplicity has been obtained and their behavior is found to be independent of
collision energy.
