Study on matter creation and production of density perturbation in the universe based on the particle theories beyond the standard model

2014 Fiscal Year Final Research Report

• Project/Area Number: 23740206
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kanagawa University
• Principal Investigator: SHINTA Kasuya 神奈川大学, 理学部, 准教授 (00386806)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: 暗黒物質 / バリオン数 / 超対称性 / インフレーション

Outline of Final Research Achievements

This research studies the production of matter-antimatter asymmetry, the dark matter, and the density perturbation, which leads to the production of the large-scale structure of the universe, by the scalar field called the Affleck-Dine field in supersymmetric theory. In particular, in the gauge-mediated superysymmetry breaking, we propose the scenarios that explain both the baryon asymmetry and the dark matter of the universe, which the latter could be gravitinos or Q balls. On the other hand, we construct the high-scale inflation model with the Affleck-Dine field as the inflaton, and could explain both the density perturbation and the baryon asymmetry of the universe.

Free Research Field

宇宙物理学、素粒子論的宇宙論