  This study presents a comprehensive analysis of particle production in
proton-proton ($pp$) collisions at $\sqrt{s}$ = 7 TeV using Pythia~8 event
generator. We investigate the transverse momentum $p_T$ spectra of light
charged hadrons ($\pi^\pm$, $K^\pm$ and $p(\bar p)$), their yield ratios
($\pi^-/\pi^+$, $K^-/K^+$ and $\bar{p}/p$), and $p_T$-differential ratios
($(K^++K^-)/(\pi^++\pi^-)$, $(\overline{p}+p)/(\pi^++\pi^-)$) and mean
transverse momentum ($\langle p_\mathrm{T} \rangle$). Our analysis employs
various Pythia~8 tunes (Simple, Vincia, and Dire) to explore the impact of
different model configurations on particle production. We optimize a key
parameter ($p_\mathrm{T}HatMin$) within each tune to achieve the best agreement
between the simulated \ppt spectra and those measured by the CMS collaboration.
Interestingly, we find that the optimal values for $p_\mathrm{T}HatMin$ differ
between hadron species, potentially reflecting the influence of particle mass
on production mechanisms. It is not possible to simultaneously and
qualitatively describe both, the strangeness enhancement and collectivity in
$pp$ collisions from \pythia~8. Further investigation such as final-state
effects such as color ropes or junctions may require to explain these effects.
These types of studies help us identify limitations in current models and
refine their parameters to better explain experimental observations.
