Higher-Order Spectra of Weak Lensing Convergence Maps in Parameterized Theories of Modified Gravity

Understand

We compute the low-$\ell$ limit of the family of higher-order spectra for projected (2D) weak lensing convergence maps.

• In this limit, these spectra are computed to an arbitrary order using {\em tree-level} perturbative calculations.
• We use the flat-sky approximation and Eulerian perturbative results based on a generating function approach.
• We test these results for the lower-order members of this family, i.e.