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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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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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 / インフレーション宇宙 / 原始ブラックホール / アクシオン / 等曲率揺らぎ / インフレーション / 密度揺らぎ |
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| 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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Report
(5 results)
Research Products
(70 results)
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[Journal Article] Cosmology with a heavy Polonyi field2016
Author(s)
K. Harigaya, T. Hayakawa, M. Kawasaki and M. Yamada
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Journal Title
Journal of Cosmology and Astroparticle Physics
Volume: 1606
Issue: 06
Pages: 015-015
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] The two-field regime of natural inflation2015
Author(s)
A. Achucarro, V. Atal, M. Kawasaki and F. Takahashi
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Journal Title
Journal of Cosmology and Astroparticle Physics
Volume: 1512
Issue: 12
Pages: 044-044
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Curvaton in large field inflation2014
Author(s)
Tomohiro Fujita, Masahiro Kawasaki, Shuichiro Yokoyama
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Journal Title
Journal of Cosmology and Astroparticle Physics
Volume: 1409, 015
Issue: 09
Pages: 1-17
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] 素粒子的宇宙論
Author(s)
川崎雅裕
Organizer
第26回理論墾シンポジウム
Place of Presentation
東京大学柏キャンパス
Related Report
Invited
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