Analysis and cosmological verification of various gravitational theories based on unified theory of fundamental interactions

2016 Fiscal Year Final Research Report

• Project/Area Number: 25400276
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Waseda University
• Principal Investigator: Maeda Kei-ichi 早稲田大学, 理工学術院, 教授 (70199610)
• Research Collaborator: Gibbons Gary Cambridge University, Department of Applied Mathematics and Theoretical Physics, professor
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 重力理論 / ダークエネルギー / 宇宙論 / インフレーション / 素粒子統一理論

Outline of Final Research Achievements

We analyse various gravity theories which may resolve two most important subjects in modern cosmology (inflation and dark energy problem) based on the unified theory of fundamental interactions. We propose two new inflationary scenarios (Higgs inflation based on standard model of particle physics and KKLMMT inflation based on superstring theory), which are extended from the original models and satisfy the observational constraints well. As for the dark energy problem, we mainly analyse bigravity theory, in which one of gravitons is massive. We show that it may resolves the dark matter problem as well as the dark energy problem.

Free Research Field

宇宙論・重力理論