| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Outline of Final Research Achievements |
We searched for the models beyond the Standard Model that resolve the following two major cosmological problems: (1) the abundance of the dark matter in the universe, and (2) the possible deficit of the abundance of premordial lithium. We also put the constraint on the mass of Higgs particle to be 125 GeV. Our scenario is build around the next-to-minimal supersymmetric standard model. The next-to-lightest supersymmetric particles (NLSP) interact with the lithium nuclei during the nucleosynthesis and destroy part of them. The NLSP's eventually decay to the lightest supersymmetric particles, left as the stable dark matter to date. Varying the values of model parameters, we simulated the reactions of the particles and nuclei during the nucleosynthesis and calculated the relic abundance of the lithium and the dark matter. We showed the parameter region that is consistent with all the phenomenological constraints, and thereby proved that our senario is indeed viable.
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