Cosmological Problems in Supergravity in Inflationary Universe

暴胀宇宙中超引力的宇宙学问题

• 批准号: 10640250
• 负责人: KAWASAKI Masahiro
• 金额: $ 2.11万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640250/
• 关键词: Inflationary Universe; Supersymmetry; Particle Cosmology; black hole; 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

We have studied inflationary universe models in the framework of supergravity. We have solved initial value problem in a new inflation model introducing "pre-inflation" 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 Q-balls and Affleck-Dine field and have found that the model parameters are stringently constrained by the existence of the Q-ball. 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.

我们在超引力框架下研究了暴胀宇宙模型。我们已经解决了新暴胀模型中的初始值问题，引入了“预暴胀”，该模型发生在新暴胀之前，并通过超重力效应设置初始值。这种“双重膨胀”模型会导致原始黑洞的产生或密度波动功率谱的破坏。我们还研究了超重力下的混沌暴胀模型，该模型很难构建现实的模型。通过引入新的对称性，我们成功地构建了超引力中的混沌暴胀模型。此外，我们研究了 SUSY 模型中的重子发生，特别是研究了 Q 球和 Affleck-Dine 场的动力学，发现模型参数受到 Q 球的存在的严格约束。我们还考虑了超弦理论中的模量问题，并表明解决该问题所需的熵产生与重子发生几乎不一致。

项目成果

M.Kawasaki: "Primordial Black Hole Formation in Supergravity" Physial Review. 59. 043512-1-7 (1999)

M.Kawasaki：“超重力中的原始黑洞形成”物理评论。

S.Kasuya: "Topological Defects Formation after Inflation on Lattice Simulation" Physical Review D. 58. 083516-1-6 (1998)

S.Kasuya：“晶格模拟膨胀后的拓扑缺陷形成”物理评论 D. 58. 083516-1-6 (1998)

K. Izawa: "R-invariant Topological Inflation"Progress of Theoretical Physics. 101. 1129-1133 (1999)

K. Izawa：“R-不变拓扑暴胀”理论物理进展。

S.Kasuya, M.Kawasaki: "Q-ball formation : Obstacle to Affleck-Dine baryogenesis in the gauge-mediated SUSY breaking?"Physical Review. D64. 123515-1-123515-27 (2001)

S.Kasuya，M.Kawasaki：“Q 球形成：规范介导的 SUSY 破坏中阿弗莱克-丁重子发生的障碍？”物理评论。

M.Kawasaki,K.Kohri,,N.Sugiyama: "MeV-scale Reheating Temperature and Thermalization of Neutrino Background"Physical Review. D62. 023506-1-18 (2000)

M.Kawasaki,K.Kohri,,N.Sugiyama：“中微子背景的 MeV 级再加热温度和热化”物理评论。