Figure-Based Benchmark Comparison of Short-Range Yukawa Constraints for a Fixed-Coupling Trajectory

This paper presents a benchmark comparison between a fixed-coupling Yukawa trajectory, defined by \alpha = 1/6 and \lambda = M_{\mathrm{Pl}}/(8.57\,\Lambda_R^2), and selected published short-range exclusion contours. The comparison is carried out using figure-based digitization of the torsion-balance result of Lee et al. (2020) and the differential Casimir-force result of Chen et al. (2016). At the four explicitly tested benchmark points \Lambda_R = 1, 3, 5, and 10\,\mathrm{TeV}, the trajectory lies below the digitized exclusion curves. The closest approach occurs near \lambda \simeq 56\,\mu\mathrm{m}, where the Lee et al. contour exceeds the benchmark coupling by a factor of about 1.7. The paper is intentionally narrow in scope: it is a figure-based phenomenology comparison, not a global exclusion analysis or a reanalysis of raw experimental data.