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Inflaton versus Curvaton in Higher Dimensional Gauge Theories

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arxiv 1004.5477 v3 pith:Y32KMTD7 submitted 2010-04-30 hep-ph hep-th

Takeo Inami , Yoji Koyama , Chia-Min Lin , Shie Minakami This is my paper · ORCID
classification hep-phhep-th
keywords curvatongaugeinflatonmodelperturbationscalartheoryapply
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abstract

We construct a model of cosmological inflation and perturbation based on the higher-dimensional gauge theory. The inflaton and curvaton are the scalar fields arising from the extra space components of the gauge field living in more than four dimensions. We take the six-dimensional (6D) Yang-Mills theory compactified on $T^2$ as a toy model, and apply the one-loop effective potential of the inflaton and the curvaton to the curvaton scenario. We have found that the curvaton is subdominant for the linear curvature perturbation, but that a significant non-Gaussianity and a sizable tensor to scalar ratio are generated.

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  1. Analysis of inflationary models in higher-dimensional uniform inflation

    hep-ph 2025-01 conditional novelty 5.0 of 10

    In (D+4)-dimensional uniform inflation the spectral index and tensor-to-scalar ratio are ns=1-(D+6)ε+2η and r=8(D+2)ε, which excludes D≥2 for the five models studied while allowing D=1 in the b0k >> 1 branch.

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