Probing Cosmology through Higher-Order CMB Lensing Statistics

          @misc{ scivideos_PIRSA:26060031,
            doi = {10.48660/26060031},
            url = {https://pirsa.org/26060031},
            author = {Chen, Shu-Fan},
            keywords = {Cosmology},
            language = {en},
            title = {Probing Cosmology through Higher-Order CMB Lensing Statistics},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2026},
            month = {jun},
            note = {PIRSA:26060031 see, \url{https://scivideos.org/pirsa/26060031}}
          }
          

Abstract

We investigate the cosmological information content of higher-order statistics of the CMB lensing convergence field for near-term experiments similar to the Simons Observatory. Using a field-level forward-modeling pipeline based on ray-traced $N$-body simulations with realistic SO-like lensing reconstruction, we measure non-Gaussian statistics such as Minkowski functionals, peak/minima counts, and train emulators to model their dependence on $\Omega_m$, $A_s$, and $M_\nu$. We quantify the information gain beyond the lensing power spectrum and identify which statistics are most robust to reconstruction noise, highlighting the potential of non-Gaussian statistics to enhance cosmological constraints from upcoming CMB surveys.