Non-minimally assisted chaotic inflation

Sang Chul Hyun; Jinsu Kim; Seong Chan Park; Tomo Takahashi

doi:10.1088/1475-7516/2022/05/045

Non-minimally assisted chaotic inflation

Sang Chul Hyun, Jinsu Kim, Seong Chan Park, Tomo Takahashi

Department of Physics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Conventional wisdom says that a chaotic inflation model with a power-law potential is ruled out by the recent Planck-BICEP/Keck results. We find, however, that the model can be assisted by a non-minimally coupled scalar field and still provides a successful inflation. Considering a power-law chaotic inflation model of the type V ∼φn with n = {2, 4/3, 1, 2/3, 1/3}, we show that n = 1/3 (n = {2/3, 1/3}) may be revived with the help of the quadratic (quartic) non-minimal coupling of the assistant field to gravity.

Original language	English
Article number	045
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2022
Issue number	5
DOIs	https://doi.org/10.1088/1475-7516/2022/05/045
Publication status	Published - 2022 May 1

Bibliographical note

Publisher Copyright:
© 2022 The Author(s).

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics

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10.1088/1475-7516/2022/05/045

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abstract = "Conventional wisdom says that a chaotic inflation model with a power-law potential is ruled out by the recent Planck-BICEP/Keck results. We find, however, that the model can be assisted by a non-minimally coupled scalar field and still provides a successful inflation. Considering a power-law chaotic inflation model of the type V ∼φn with n = {2, 4/3, 1, 2/3, 1/3}, we show that n = 1/3 (n = {2/3, 1/3}) may be revived with the help of the quadratic (quartic) non-minimal coupling of the assistant field to gravity.",

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AU - Takahashi, Tomo

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AB - Conventional wisdom says that a chaotic inflation model with a power-law potential is ruled out by the recent Planck-BICEP/Keck results. We find, however, that the model can be assisted by a non-minimally coupled scalar field and still provides a successful inflation. Considering a power-law chaotic inflation model of the type V ∼φn with n = {2, 4/3, 1, 2/3, 1/3}, we show that n = 1/3 (n = {2/3, 1/3}) may be revived with the help of the quadratic (quartic) non-minimal coupling of the assistant field to gravity.

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Non-minimally assisted chaotic inflation

Abstract

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