Resolution of the Polynomial Obstruction: Two-Scale Kinetic Completion

Key Points

• The study aims to resolve the Cassini PPN tension by introducing a new two-scale kinetic completion model.
• Introduced the two-scale kinetic completion B'' with a specific polynomial form.
• Analyzed the impact of an additional X^3 term on PPN screening.
• Maintained properties such as ghost freedom and gradient stability.
• The new model enhances the PPN screening factor without affecting galactic observations.
• The compatibility range for parameters X_s/X_g is established between 100 and 348.
• Gradient stability and subluminality are preserved in the new framework.