https://doi.org/10.1140/epjc/s10052-024-13644-2
Regular Article
Primordial black holes from effective field theory of stochastic single field inflation at NNNLO
1
Centre For Cosmology and Science Popularization (CCSP), SGT University, Gurugram, 122505, Delhi-NCR, Haryana, India
2
Department of Physical Sciences, Indian Institute of Science Education and Research Berhampur, Transit Campus, Government ITI, 760010, Berhampur, Odisha, India
3
Center for Theoretical Physics, Eurasian National University, 010008, Astana, Kazakhstan
4
Chinese Academy of Sciences, 52 Sanlihe Rd, Xicheng District, Beijing, China
a sayantan_ccsp@sgtuniversity.org, sayanphysicsisi@gmail.com
Received:
1
August
2024
Accepted:
24
November
2024
Published online:
14
January
2025
We present a study of the Effective Field Theory (EFT) generalization of stochastic inflation in a model-independent single-field framework and its impact on primordial black hole (PBH) formation. We show how the Langevin equations for the “soft” modes in quasi de Sitter background is described by the Infra-Red (IR) contributions of scalar perturbations, and the subsequent Fokker–Planck equation driving the probability distribution for the stochastic duration , significantly modify in the present EFT picture. An explicit perturbative analysis of the distribution function by implementing the stochastic-
formalism is performed up to the next-to-next-to-next-to-leading order (NNNLO) for both the classical-drift and quantum-diffusion dominated regimes. In the drift-dominated limit, we perturbatively analyse the local non-Gaussianity parameters
with the EFT-induced modifications. In the diffusion-dominated limit, we numerically compute the probability distribution featuring exponential tails at each order of perturbative treatment.
© The Author(s) 2024
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