Title: Self-scattering of inflaton during inflation
Abstract: Inflationary models predicting a scale-dependent large amplification of the density perturbations have recently attracted a lot of attention because the amplified perturbations can seed a sizable amount of primordial black holes and stochastic background of gravitational waves. While power spectra in these models are often computed ignoring the inflaton self-scattering, the self-scattering (or loop correction) is generally non-negligible in such inflation models with large amplification of perturbations. In this talk, I will highlight what changes and remains unchanged by inflaton self-scattering during inflation. References: arXiv:2211.02586, 2403.04682, 2403.12811, 2502.08707, and 2502.12112
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