Document detail
ID
oai:arXiv.org:2406.02417
Topic
Astrophysics - Cosmology and Nonga... General Relativity and Quantum Cos... High Energy Physics - Phenomenolog... High Energy Physics - TheoryAuthor
Ballesteros, Guillermo Konstandin, Thomas Rodríguez, Alejandro Pérez Pierre, Mathias Rey, JuliánCategory
sciences: astrophysics
Year
2024
listing date
6/12/2024
Abstract
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 $\delta N$ formalism, without invoking stochastic inflation.
Previously reported discrepancies between both approaches are a consequence of not correctly accounting for momentum perturbations.
Once they are taken into account, both approaches agree to an excellent degree.
The shape of the tail depends strongly on the phase space of inflation.
;Comment: 24 pages, 4 figures
Ballesteros, Guillermo,Konstandin, Thomas,Rodríguez, Alejandro Pérez,Pierre, Mathias,Rey, Julián, 2024, Non-Gaussian tails without stochastic inflation
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