2012 Fiscal Year Final Research Report
Study on evolution of scalar fields in the early universe and its observational consequences
| Project/Area Number |
22540267
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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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) |
2010 – 2012
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| Keywords | 素粒子的宇宙論 / インフレーション / アクシオン / 位相欠陥 / 超対称性 |
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| Research Abstract |
We studied localized scalar field configurations such as topological defects (domain walls and strings) produced in the vacuum phase transitions and Q-balls predicted in supersymmetric theories. We investigated the cosmological evolution of those scalar fields by numerical simulations and estimated dark matter and baryon number densities which they produce. Thereby, we obtained constraints on particle physics models by using observational data.
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