2010 Fiscal Year Final Research Report
Multi-faceted approach on elementary particles from accelerators, space, and underground
| Project/Area Number |
20540257
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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 |
HITOSHI Murayama The University of Tokyo, 数物連携宇宙研究機構, 特任教授 (20222341)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 素粒子物理 / 加速器実験 / 観測論的宇宙論 / ニュートリノ / 暗黒物質 |
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| Research Abstract |
We developed a novel analysis technique to determine the spin of particles at accelerator experiments such as LHC which is free from theoretical assumptions about the underlying models. This technique should be applicable to existing data from Tevatron and LEP-II. We determined the neutrino parameters more precisely with the KamLAND experiment, and showed indirect hints for θ13, the only mixing angle yet to be measured. With observation of space, we released the largest image of the Universe ever, which covers more than a third of the celestial sphere with more than a trillion pixels. In addressing the common problem in these three, we discovered a new mechanism that enhances the annihilation probability of dark matter particles in our galaxy, and pointed out the possibility to find its evidence in underground neutrino detectors.
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