| Project/Area Number |
05640337
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | Kanazawa University |
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Principal Investigator |
SUEMATSU Daijiro Kanazawa University, Department of Physics, Associate Professor, 理学部, 助教授 (90206384)
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| Co-Investigator(Kenkyū-buntansha) |
KUBO Jisuke Kanazawa University, College of Liberal Arts, Associate Professor, 教養部, 助教授 (40211213)
TERAO Haruhiko Kanazawa University, Department of Physics, Assistant Professor, 理学部, 助手 (40192653)
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| Project Period (FY) |
1993 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | Superstring / Supersymmetry / Unified theory |
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| Research Abstract |
The features of effective supergravity models derived as the low energy effective theory of superstring have been studied from various points of view. The main results obtained in this project are followings.
1.The general features of soft supersymmetry breaking parameters which appear in the effective supergravity models have been studied. The phenomenological aspects brought by the nonuniversal soft breaking parameters have also been investigated. In these studies we found that the hierarchical soft scalar masses could be realized. We also examined how these soft scalar masses affect the gauge coupling unification and the relation between the CP phases appeared in soft breaking parameters and the electric dipole moment of neutron. As the results we found that there could be new phenomenological possibilities which have not been found in the usual universal soft supersymmetry breaking. We also studied the flavor structure of the soft supersymmetry breaking parameters and derived sum ru
… More
les for them.
2.We have examined the various phenomenological features of models with extra U (1) symmetries and gauge singlet fields which often appeared in the effective models of superstring. Especially, in these studies we concentrated ourselves to the models which could realize the small neutrino masses. The study of the relation between the radiative symmetry breaking and the extra Z' mass has been done on the basis of the renormalization group wquations. We found that the D-term flat direction associated with the extra U (1) could have interesting effects on the inflation cosmology. We constructed a model which could guarantee the proton stability in the natural way. In such a model we found that it was possible to realize the hierarchical neutrino masses which could explain the solar neutrino problem, the atmospheric neutrino problem and dark matter simultaneously.
These results are important parts of our subjects which were aimed to study at the beginning of this project. We have already presented these results as the talks in the conferences and also published in the journals. Less
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