  We have investigated the pseudo-scalar meson structure in the form of
transverse momentum-dependent parton distribution functions (TMDs) in the
light-front based holographic model and quark model. Starting from leading
order, we have calculated all the time-reversal even TMDs for pion and kaon up
to twist-$4$ in these models. We have shown the 3-dimensional structure as well
as the 2-dimensional structure of these particles along with their average
quark transverse momenta. The parton distribution functions (PDFs) of
pseudo-scalar mesons have been compared with the results of other models. The
sum rules, TMD transverse dependence, inverse moments and Gaussian transverse
dependence ratio in these models have also been studied. Further, the
transverse quark densities have also been analyzed in the momentum space plane
for these particles. The higher twist kaon properties in light-front dynamics
have been predicted for the first time in this work.
