Clockwork inflation with non-minimal coupling

Seong Chan Park; Chang Sub Shin

doi:10.1140/epjc/s10052-019-7037-4

Clockwork inflation with non-minimal coupling

Seong Chan Park, Chang Sub Shin

Department of Physics

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

7 Citations (Scopus)

Abstract

We suggest a clockwork mechanism for a Higgs-like inflation with the non-minimal coupling term ξϕ²R. The seemingly unnatural ratio of parameters, λ/ ξ²∼ 10 ^{- 10} of the self quartic coupling of the inflaton, λ, and the non-minimal coupling, ξ, is understood by exponential suppression of λ by the clockwork mechanism, instead of a large non-minimal coupling. The portal interaction between the inflaton and the Standard Model (SM) Higgs doublet is introduced as a source of reheating and the inflaton mass. Successful realization of inflation requires that the inflaton gets a mass around (sub) GeV scale, which would lead to observable consequences depending on reheating process and its lifetime.

Original language	English
Article number	529
Journal	European Physical Journal C
Volume	79
Issue number	6
DOIs	https://doi.org/10.1140/epjc/s10052-019-7037-4
Publication status	Published - 2019 Jun 1

Bibliographical note

Funding Information:
This work is supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2016R1A2B2016112) and (NRF-2018R1A4A1025334) (SCP), and by IBS under the project code, IBS-R018-D1 (CSS).

Funding Information:
Acknowledgements This work is supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2016R1A2B2016112) and (NRF-2018R1A4A1025334) (SCP), and by IBS under the project code, IBS-R018-D1 (CSS).

Publisher Copyright:
© 2019, The Author(s).

All Science Journal Classification (ASJC) codes

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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10.1140/epjc/s10052-019-7037-4

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title = "Clockwork inflation with non-minimal coupling",

abstract = "We suggest a clockwork mechanism for a Higgs-like inflation with the non-minimal coupling term ξϕ2R. The seemingly unnatural ratio of parameters, λ/ ξ2∼ 10 - 10 of the self quartic coupling of the inflaton, λ, and the non-minimal coupling, ξ, is understood by exponential suppression of λ by the clockwork mechanism, instead of a large non-minimal coupling. The portal interaction between the inflaton and the Standard Model (SM) Higgs doublet is introduced as a source of reheating and the inflaton mass. Successful realization of inflation requires that the inflaton gets a mass around (sub) GeV scale, which would lead to observable consequences depending on reheating process and its lifetime.",

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N2 - We suggest a clockwork mechanism for a Higgs-like inflation with the non-minimal coupling term ξϕ2R. The seemingly unnatural ratio of parameters, λ/ ξ2∼ 10 - 10 of the self quartic coupling of the inflaton, λ, and the non-minimal coupling, ξ, is understood by exponential suppression of λ by the clockwork mechanism, instead of a large non-minimal coupling. The portal interaction between the inflaton and the Standard Model (SM) Higgs doublet is introduced as a source of reheating and the inflaton mass. Successful realization of inflation requires that the inflaton gets a mass around (sub) GeV scale, which would lead to observable consequences depending on reheating process and its lifetime.

AB - We suggest a clockwork mechanism for a Higgs-like inflation with the non-minimal coupling term ξϕ2R. The seemingly unnatural ratio of parameters, λ/ ξ2∼ 10 - 10 of the self quartic coupling of the inflaton, λ, and the non-minimal coupling, ξ, is understood by exponential suppression of λ by the clockwork mechanism, instead of a large non-minimal coupling. The portal interaction between the inflaton and the Standard Model (SM) Higgs doublet is introduced as a source of reheating and the inflaton mass. Successful realization of inflation requires that the inflaton gets a mass around (sub) GeV scale, which would lead to observable consequences depending on reheating process and its lifetime.

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Clockwork inflation with non-minimal coupling

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