Project/Area Number  10640250 
Research Category 
GrantinAid for Scientific Research (C).

Section  一般 
Research Field 
素粒子・核・宇宙線

Research Institution  The University of Tokyo 
Principal Investigator 
KAWASAKI Masahiro Graduate School of Science, The University of Tokyo, Professor, 大学院・理学系研究科, 教授 (50202031)

Project Fiscal Year 
1998 – 2001

Project Status 
Completed(Fiscal Year 2001)

Budget Amount *help 
¥3,300,000 (Direct Cost : ¥3,300,000)
Fiscal Year 2001 : ¥600,000 (Direct Cost : ¥600,000)
Fiscal Year 2000 : ¥600,000 (Direct Cost : ¥600,000)
Fiscal Year 1999 : ¥600,000 (Direct Cost : ¥600,000)
Fiscal Year 1998 : ¥1,500,000 (Direct Cost : ¥1,500,000)

Keywords  Inflationary Universe / Supersymmetry / Particle Cosmology / black hole / インフレーション宇宙 / 超対称性 / 素粒子的宇宙論 / ブラックホール / インフレーション / 超重力理論 / バリオン数生成 / 銀河形成 / 原始ブラックホール 
Research Abstract 
We have studied inflationary universe models in the framework of supergravity. We have solved initial value problem in a new inflation model introducing "preinflation" which takes place before the new inflation and sets the initial vale through supergravity effects. This "double inflation" model leads to production of primordial black holes or a broken power spectrum of density fluctuations. We have also studied a chaotic inflation model in supergravity which was difficult to construct a realistic model. By introducing a new symmetry we have successfully constructed a chaotic inflation model in supergravity. Furthermore, we have studied baryogenesis in SUSY models and, in particular, studied the dynamics of the Qballs and AffleckDine field and have found that the model parameters are stringently constrained by the existence of the Qball. We have also considered the moduli problem in superstring theories and shown that the entropy production which is necessary to solve that problem is hardly consistent with baryogenesis.
