| Project/Area Number |
26400252
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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 | Tokyo Metropolitan University |
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Principal Investigator |
|
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| Research Collaborator |
Maeda Keiichi
Tsujikawa Shinji
Hamaguchi Koichi
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| Project Period (FY) |
2014-04-01 – 2019-03-31
|
| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | supergravity / inflation / dark energy / dark matter / supersymmetry breaking / reheating / modified gravity / string theory |
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| Outline of Final Research Achievements |
The purpose of our research is to understand the evolution of the Universe, and the origin of elementary particles. This is related to the more specific problems such as (i) what causes the accelerated expansion of the Universe?, (ii) what is the reason for keeping the galaxies together?, and (iii) what is the mechanism of the structure formation in the early Universe? These problems are called dark energy, dark matter, and inflation, respectively. The current scientific knowledge about gravity and elementary particles is not enough to address these problems, so that more advanced theories should be developed. Our approach is based on the supergravity theory that unifies gravity with other forces and relates particles of different spin and statistics. We succeeded in constructing the new models of supergravity, which are consistent with all observations and have the specific mechanisms of inflation and dark energy, together with a suitable elementary particle for dark matter.
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| Academic Significance and Societal Importance of the Research Achievements |
Our research results brought better understanding of dark energy, dark matter and cosmological inflation in the supergravity theory, which is non-trivial. This further
strengthened the supergravity itself as the viable candidate for new physics beyond the Standard Model of elementary particles.
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