A minimal gauge inflation model

Jinn-Ouk Gong; Seong Chan Park

doi:10.1088/1674-1137/42/9/095102

Chinese Physics C> 2018, Vol. 42> Issue(9) : 095102 DOI: 10.1088/1674-1137/42/9/095102

A minimal gauge inflation model

Jinn-Ouk Gong ¹ ,
Seong Chan Park ^2,,

1.
Korea Astronomy and Space Science Institute, Daejeon 34055, Korea
2.
Department of Physics and IPAP, Yonsei University, Seoul 03722, Korea

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Abstract：
In this paper, we present a gauge inflation model based on the orbifold M₄×S¹/Z₂ with non-Abelian SU(2) gauge symmetry, which is probably the simplest model in this category. As the inflaton potential is fully radiatively generated exclusively by gauge self-interactions, the model is predictive; thus, it is protected by gauge symmetry itself, without the introduction of any additional matter fields or arbitrary interactions. We show that the model fully agrees with the recent cosmological observations within the controlled perturbative regime of gauge interactions, g₄ ≲ 1/(2πRM_P), with the compactification radius (10 ≲ RM_P ≲ 100):the expected magnitude of the curvature perturbation power spectrum and the value of the corresponding spectral index are in perfect agreement with the recent observations. The model also predicts a large fraction of the gravitational waves, negligible non-Gaussianity, and a sufficiently high reheating temperature.
- inflation ,
- non-Gaussianity ,
- extra dimension

References

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Jinn-Ouk Gong and Seong Chan Park. A minimal gauge inflation model[J]. Chinese Physics C, 2018, 42(9): 095102. doi: 10.1088/1674-1137/42/9/095102

Jinn-Ouk Gong and Seong Chan Park. A minimal gauge inflation model[J]. Chinese Physics C, 2018, 42(9): 095102. doi: 10.1088/1674-1137/42/9/095102 shu

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Received: 2018-06-04

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supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (2016R1A2B2016112)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

A minimal gauge inflation model

Corresponding author: Seong Chan Park,

1. Korea Astronomy and Space Science Institute, Daejeon 34055, Korea

2. Department of Physics and IPAP, Yonsei University, Seoul 03722, Korea

Received Date: 2018-06-04

Available Online: 2018-09-05

Fund Project: supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (2016R1A2B2016112)

Abstract: In this paper, we present a gauge inflation model based on the orbifold M₄×S¹/Z₂ with non-Abelian SU(2) gauge symmetry, which is probably the simplest model in this category. As the inflaton potential is fully radiatively generated exclusively by gauge self-interactions, the model is predictive; thus, it is protected by gauge symmetry itself, without the introduction of any additional matter fields or arbitrary interactions. We show that the model fully agrees with the recent cosmological observations within the controlled perturbative regime of gauge interactions, g₄ ≲ 1/(2πRM_P), with the compactification radius (10 ≲ RM_P ≲ 100):the expected magnitude of the curvature perturbation power spectrum and the value of the corresponding spectral index are in perfect agreement with the recent observations. The model also predicts a large fraction of the gravitational waves, negligible non-Gaussianity, and a sufficiently high reheating temperature.

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A minimal gauge inflation model

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