Clockwork inflation with non-minimal coupling

Seong Chan Park, Chang Sub Shin

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


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 languageEnglish
Article number529
JournalEuropean Physical Journal C
Issue number6
Publication statusPublished - 2019 Jun 1

Bibliographical note

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).

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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