What the source model fixes

What the source model fixes

Conditional on RS2, the source action fixes the following:

1. the tensor form and numerical coefficients of $\Pi_{\mu\nu}$, (37);

2. the sign of the high-density correction for a positive-tension brane;

3. the $\rho^2$ and $a^{-4}$ scalings in the homogeneous sector;

4. the massless graviton pole plus a positive KK continuum in linear RS2;

5. the leading $1/r^3$ potential correction and the ratio of the two metric potentials;

6. the cross-regime relation (85);

7. covariant conservation of the total projected response.

Everything not fixed , the choice of RS2 itself, the value of $\ell$, the bulk state and $\mu$, the boundary condition, possible non-minimal operators, and the ultraviolet completion , is collected with the corresponding failure modes in Section 15. The cross-regime relation removes $\ell$ from one comparison; it does not remove the physical assumptions defining the source model.