Non-gaussianity in anisotropic inflation
Project/Area Number |
25400251
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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Research Institution | Kobe University |
Principal Investigator |
Soda Jiro 神戸大学, 理学(系)研究科(研究院), 教授 (00222076)
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Project Period (FY) |
2013-04-01 – 2016-03-31
|
Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
Keywords | anisotropic inflation / non-gaussianity / gauge fields / 非ガウス性 / 非等方インフレーション / ゲージ場 / 重力波 / 非等方性 / 宇宙背景放射 / 反対称テンソル |
Outline of Final Research Achievements |
We calculated the non-gaussianity in anisotropic inflation systematically. In addition to the non-gaussianity, we have also evaluated the spectral index and the tensor-scalar ratio in anisotropic inflation. Then, we compared those with Planck data. Consequently, we succeeded in putting constraints on the model parameters in anisotropic inflation. In the previous studies in anisotropic inflation, a specific functional relation between the potential function of inflaton and the gauge kinetic function had been assumed. In order to reveal universality of the anisotropic inflation, we considered more general potential function and the gauge kinetic function. As a result, we have shown that the anisotropic inflation can generically occur for some short period during inflation or in the last stage of inflation. This clearly shows the universality of the anisotropic inflation.
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Report
(4 results)
Research Products
(21 results)