Two shadows on two backlights: forecasting the Ly-$\alpha$ forest $\times$ CMB Lensing bispectrum from ACT/SO/S4 & DESI

Adrien La Posta, Emmanuel Schaan

We forecast the sensitivity of future correlations between CMB lensing and the Lyman-$\alpha$ forest power spectrum. This squeezed-limit bispectrum probes the connection between the Lym…