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Polyinstanton axion inflation

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Title: Polyinstanton axion inflation
Authors: Kobayashi, Tatsuo Browse this author →KAKEN DB
Uemura, Shohei Browse this author
Yamamoto, Junji Browse this author
Issue Date: 15-Jul-2017
Publisher: American Physical Society (APS)
Journal Title: Physical review D
Volume: 96
Issue: 2
Start Page: 026007
Publisher DOI: 10.1103/PhysRevD.96.026007
Abstract: We investigate the axion inflation model derived by polyinstanton effects in type II superstring theories. Polyinstanton effects are instanton effects corrected by another instanton and they can generate the modulus-axion potential with the double exponential function. Although the axion has a period of small value, this potential can have a flat region because its derivatives are exponentially suppressed by nonperturbative effects. From the view point of the cosmic inflation, such a potential is interesting. In this paper, we numerically study the possibilities of realizing the cosmic inflation. We also study their spectral index and other cosmological observables, numerically.
Rights: ©2017 American Physical Society
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小林 達夫

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