Speaker
Description
We study the open-charm sectors $cs\bar q\bar q$ and $cq\bar s\bar q$ in a Cornell-type diquark--antidiquark framework and examine $DK$--$D^*K^*$ dressing of the compact $cs\bar q\bar q$ scalar associated with $T_{cs0}^{*}(2870)^0$. The corrected $[cq][\bar s\bar q]$ partition places the axial--axial $cq\bar s\bar q$ spectrum below the $[cs][\bar q\bar q]$ spectrum and produces the observed $D_s\pi$ rearrangement topology. The displayed $3S$, $2P$, and $1D$ levels are relative-motion excitations in a frozen-cluster approximation. A same-parameter control shows that the mean-$\langle p^2\rangle$ prescription shifts the ground scalar by $58$--$71$ MeV, while the momentum-space square-root expectation gives $98$--$119$ MeV; the larger separation of separately calibrated NR and SR spectra is mainly parametric. In the continuum analysis, $M_R=M_0+\delta M$ makes the matching freedom explicit. At fixed hadronic range, a twice-subtracted $D^*K^*$ loop isolates threshold curvature from ultraviolet analytic terms. A running-width $K^*$ spectral convolution shows a dispersive distortion near the vector threshold, while $DK$ supplies most of the absorptive width. Stable-$K^*$ pole and residue quantities are used only as analytic diagnostics. The resulting picture separates model-dependent short-distance masses from energy dependence generated by the hadronic continuum without assigning a compact--molecular probability.