Cosmological constant problem, gravity loop and instanton corrections

2014 Fiscal Year Final Research Report

• Project/Area Number: 24540285
• 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: The Institute of Physical and Chemical Research (2014); Chuo University (2012-2013)
• Principal Investigator: INAMI Takeo 独立行政法人理化学研究所, 仁科加速器研究センター, 客員研究員 (20012487)
• Co-Investigator(Kenkyū-buntansha): KITAZAWA Yoshihisa 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (10195258)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: cosmological problem / quantum gravity / de Sitter space / infrared divergence / cosmological inflation / higher dimensions

Outline of Final Research Achievements

We have addressed the questions: 1) to clarify the inflation mechanism based on particle physics theory and 2) to explain the smallness of the observed cosmological constant. We have obtained a few results on these two questions as written below. Concerning 1) we have constructed three new models, a) Higgs inflation model based on higher-dimensional gauge theory, b) radion inflation model based on higher-dimensional gravity, c) radion-Higgs inflation based on the higher-dimensional gravity and gauge theory. The idea of c) was first proposed by us.
Concerning 2), focusing on the two dimensional gravity theory, we have constructed quantum Liouville theory with matter on de Sitter space.

Free Research Field

素粒子論