Axion monodromy inflation with multi-natural modulations

Higaki, Tetsutaro; Kobayashi, Tatsuo; Seto, Osamu; Yamaguchi, Yuya

Axion monodromy inflation with multi-natural modulations

Higaki, Tetsutaro; Kobayashi, Tatsuo; Seto, Osamu et al.

Journal of cosmology and astroparticle physics, 2014, 2014(10), 25

Permalink : https://hdl.handle.net/2115/57805

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/57805
タイトル	Axion monodromy inflation with multi-natural modulations
著者	Higaki, Tetsutaro ; Kobayashi, Tatsuo ; Seto, Osamu ; Yamaguchi, Yuya
著者名 Higaki, Tetsutaro
e-Rad_Researcher 60322153 著者名 Kobayashi, Tatsuo
e-Rad_Researcher 40547741 著者名 Seto, Osamu
著者名 Yamaguchi, Yuya
言語	英語
キーワード	axion
	inflation
	string theory and cosmology
発行日	2014-10
出版者	IOP Publishing
収録物名	Journal of cosmology and astroparticle physics
巻(号)	2014(10)
ページ	25
抄録	We study parameter space in the axion monodromy inflation corrected by nautically generated terms involving with the axion. The potential has the linear term with multiple sinusoidal functions, which play a role in generating modulations. We show that this potential leads both to a large tensor-to-scalar ratio r(T) similar to 0.16 and to a large negative running of spectral index alpha(s) similar to -(0.02 - 0.03), ameliorating the tension between the result of the PLANCK and that of the BICEP2. To realize these results, a small hierarchy among dynamical scales is required whereas the decay constants in sinusoidal functions remain sub-Planckian in this model. We discuss also reheating process after the inflation in a bottom-up approach.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 3.0 Unported
PISSN	1475-7516
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1088/1475-7516/2014/10/025