2016 Fiscal Year Final Research Report
Multicomponent dark matter
| Project/Area Number |
25400250
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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 | Kanazawa University |
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Principal Investigator |
Aoki Mayumi 金沢大学, 数物科学系, 准教授 (70425601)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
|
| Keywords | 素粒子論 / 暗黒物質 |
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| Outline of Final Research Achievements |
The origin of dark matter (DM) cannot be found within the framework of the standard model of elementary particles. A DM candidate can be made stable by an unbroken symmetry. The simplest possibility of such a symmetry is a parity, Z2. In that case, the lightest Z2-odd particle can be a DM candidate if it is a neutral, weakly interacting and massive particle. On the other hand, a multi-component DM system can be realized if the DM stabilizing symmetry is larger than Z2. In this work, we studied the multi-component DM system in some models. A multi-component DM system induces various DM annihilation processes that are different from the standard DM annihilation process. We showed that the relic abundance of DM can be very sensitive to these non-standard DM annihilation processes.
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| Free Research Field |
素粒子論
|
