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Intrinsic non-Gaussianity of ultra slow-roll inflation
Guillermo Ballesteros, Jesús Gambín Egea, Thomas Konstandin +3
We study the non-Gaussian tail of the curvature fluctuation, , in an inflationary scenario with a transient ultra slow-roll phase that generates a localized large enhancement of…
Primordial black hole formation from self-resonant preheating?
Guillermo Ballesteros, Joaquim Iguaz Juan, Paquale D. Serpico +1
We revisit the question of how generic is the formation of primordial black holes via self-resonant growth of inflaton fluctuations in the post-inflationary, preheating phase. Usin…
Non-Gaussian tails without stochastic inflation
Guillermo Ballesteros, Thomas Konstandin, Alejandro Pérez Rodríguez +2
We show, both analytically and numerically, that non-Gaussian tails in the probability density function of curvature perturbations arise in ultra-slow-roll inflation from the …
One-loop power spectrum in ultra slow-roll inflation and implications for primordial black hole dark matter
Guillermo Ballesteros, Jesús Gambín Egea
We apply the in-in formalism to address the question of whether the size of the one-loop spectrum of curvature fluctuations in ultra-slow-roll inflation models designed for produci…