Revisiting Tilt and Tensor-to-Scalar Ratio in the Multi-Scalar Field Inflation

Autor:	Felegary, Fereshteh, Mansoori, Seyed Ali Hosseini, Serish, Tahere Fallahi, Channuie, Phongpichit
Rok vydání:	2024
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
Popis:	The present work investigates the possible range of the spectral index $n_s$ and the tensor-to-scalar ratio $r$ for a sub-class of the generalized multi-scalar field inflation, which includes a linear coupling term between the multi-scalar field potential and the canonical Lagrangian. This coupling influences the slow-roll parameters and also alters our predictions for $n_{s}$ and $r$, which directly depend on those parameters. More precisely, compared to standard multi-field inflation, the values of $n_{s}$ and $r$ decrease to levels consistent with the recent Planck+BICEP/Keck constraint. Interestingly, this validates the chaotic-type potential $V=\sum_{i} \mu_{i} \phi_{i}^{p}$, which were previously ruled out in the light of the current observations. Comment: 7 pages, 2 figures, and 2 tables
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2412.01428 Zobrazit plný text záznamu View this record from Arxiv