Description
A major CITA concentration is spatially concentrated primordial nonGaussianities (pinGs) from outlier trajectories (ponGs) which can arise generically during and after inflation from field-instabilities transverse to the inflaton flow. CMB and LSS lightcone Webskys we construct with pinGs can evade the stringent 2D perturbative single-nonG-template constraints from the ~10 e-folds probed by Planck+ACT. pinGs could play a role in the low-k CMB anomalies and have correlated localized B-modes sourced by anisotropic stress. pinGs would be more easily detected in 3D Large Scale Structure Surveys and could be hugely-big in the largely obscured 50 e-foldings from CMB/LSS scales to the end-of-inflation. We explore the generic nature of pinGs using pseudo-spectral lattice simulations applied to multi-field effective-potentials cast in an in-out state formulation. Though similar in spirit to the $mass^2 >0 $ cosmic collider program, the $mass^2 <0$ in (incomplete) phase transitions gives more dramatic observable phenomena, maybe even with entropic memories of domain wall and stringy structures in Cosmic Webskys. I will also relate this pinGy work to our popular stochastic-inflation framework.
