Naive parton picture for kaon color transparency in $A(e,e'K^+)$

Abstract Nuclear transparency in the electronuclear reaction $A(e,e'K^+)$ is investigated
in parallel with our previous study of pion transparency in
Phys.\ Rev.\ C {\bf 111}, 064608 (2025). Based on an extended Glauber
framework that incorporates shadowing from the initial-state two-step
process, kaon color transparency (CT) is analyzed to show that the
steeper $Q^2$ dependence observed for kaon CT, compared with the pion
case, is more naturally described by the naive parton model (NPM) than
by the quantum diffusion model (QDM). The inclusion of initial-state
shadowing further reduces the transparency and improves the agreement
with the experimental data. The $Q^2$ and $A$ dependences of the kaon
transparency are presented up to $Q^2=10$~GeV$^2/c^2$, together with the
corresponding $\alpha(Q^2)$ and the supplementary ratio $T_A/T_C$, for
comparison with the Jefferson Lab (JLab) data obtained with the 6-GeV
electron beam on $^{12}$C, $^{63}$Cu, and $^{197}$Au nuclei.