Inflation from periodic extra dimensions

Journal Article · Sat Jul 01 04:00:00 EDT 2017 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2017/07/011· OSTI ID:22676117

Higaki, Tetsutaro ^[1]; Tatsuta, Yoshiyuki ^[2]

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1. Department of Physics, Keio University, Kanagawa 223-8522 (Japan)
2. Department of Physics, Waseda University, Tokyo 169-8555 (Japan)

We discuss a realization of a small field inflation based on string inspired supergravities. In theories accompanying extra dimensions, compactification of them with small radii is required for realistic situations. Since the extra dimension can have a periodicity, there will appear (quasi-)periodic functions under transformations of moduli of the extra dimensions in low energy scales. Such a periodic property can lead to a UV completion of so-called multi-natural inflation model where inflaton potential consists of a sum of multiple sinusoidal functions with a decay constant smaller than the Planck scale. As an illustration, we construct a SUSY breaking model, and then show that such an inflaton potential can be generated by a sum of world sheet instantons in intersecting brane models on extra dimensions containing orbifold. We show also predictions of cosmic observables by numerical analyzes.

• OSTI ID: 22676117
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 07 Vol. 2017; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANES
COMPACTIFICATION
FORECASTING
INFLATIONARY UNIVERSE
INFLATONS
INSTANTONS
M-THEORY
PARTICLE DECAY
PERIODICITY
SUPERGRAVITY
SUPERSYMMETRY
SYMMETRY BREAKING
TRANSFORMATIONS