Hillclimbing inflation in metric and Palatini formulations

Ryusuke Jinno, Kunio Kaneta, Kin ya Oda, Seong Chan Park

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

A new setup of cosmic inflation with a periodic inflaton potential and conformal factor is discussed in the metric and Palatini formulations of gravity. As a concrete example, we focus on a natural-inflation-like inflaton potential, and show that the inflationary predictions fall into the allowed region of cosmic microwave background observations in both formulations.

Original languageEnglish
Pages (from-to)396-402
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume791
DOIs
Publication statusPublished - 2019 Apr 10

Bibliographical note

Funding Information:
The work of RJ was supported by IBS under the project code, IBS-R018-D1 . The work of SP was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Korean government ( MSIP ) (No. 2016R1A2B2016112 ) and ( NRF-2018R1A4A1025334 ). The work of KK was supported in part by the DOE grant DE–SC0011842 at the University of Minnesota.

Funding Information:
The work of RJ was supported by IBS under the project code, IBS-R018-D1. The work of SP was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2016R1A2B2016112) and (NRF-2018R1A4A1025334). The work of KK was supported in part by the DOE grant DE–SC0011842 at the University of Minnesota.

Publisher Copyright:
© 2019 The Author(s)

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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