2016 Fiscal Year Final Research Report
Origin of matter and its fluctuation in the inflationary universe
| Project/Area Number |
25400248
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Keywords | 宇宙論 / 暗黒物質 / インフレション宇宙 / バリオン数生成 / 超対称性 |
|---|
| Outline of Final Research Achievements |
We have considered axions and supersymmetric particles as promising candidates for dark matter which acquire fluctuations during inflation. We have studied cosmological effects of the fluctuations on cosmic microwave background and obtained stringent constraints on particle physics models. We have also shown that co-genesis of baryon number and dark matter is possible in Affleck-Dine mechanism which accounts for matter and anti-matter asymmetry of the universe in supersymmetric theories. Furthermore we have found that primordial black holes are a good candidate for dark matter and built a inflation model which can produce an appropriate amount of primordial black holes.
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| Free Research Field |
宇宙物理学
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