Hillclimbing inflation in metric and Palatini formulations

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

doi:10.1016/j.physletb.2019.03.012

Hillclimbing inflation in metric and Palatini formulations

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

Physics and Astronomy (Twin Cities)

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

25 Scopus citations

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 language	English (US)
Pages (from-to)	396-402
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	791
DOIs	https://doi.org/10.1016/j.physletb.2019.03.012
State	Published - Apr 10 2019

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)

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10.1016/j.physletb.2019.03.012

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title = "Hillclimbing inflation in metric and Palatini formulations",

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.",

author = "Ryusuke Jinno and Kunio Kaneta and Oda, {Kin ya} and Park, {Seong Chan}",

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: {\textcopyright} 2019 The Author(s)",

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doi = "10.1016/j.physletb.2019.03.012",

language = "English (US)",

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T1 - Hillclimbing inflation in metric and Palatini formulations

AU - Jinno, Ryusuke

AU - Kaneta, Kunio

AU - Oda, Kin ya

AU - Park, Seong Chan

N1 - 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)

PY - 2019/4/10

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N2 - 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.

AB - 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.

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Hillclimbing inflation in metric and Palatini formulations

Abstract

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