Cosmology in the natural GUT

2014 Fiscal Year Final Research Report

• Project/Area Number: 23540299
• 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: Nagoya University
• Principal Investigator: MAEKAWA Nobuhiro 名古屋大学, 基礎理論研究センター, 准教授 (40273429)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: 大統一理論 / 超対称性 / 宇宙論 / 異常U(1)対称性 / 例外群 / バリオン生成 / ダークマター / 核子崩壊

Outline of Final Research Achievements

We proposed a new Baryogenesis mechanism in grand unified theories (GUT) via B-L generation. We estimated an averaged number of dark matter in the decay shower of superheavy particles. We showed analytically and numerically that vacuum selection by producing particles which have masses through non-renormalizable interactions is possible. We showed that O(100TeV) gravitino not
only solves the cosmological gravitino problem but also improves instability of the electro-weak scale. We showed that in the case, GUT can be proved by low energy experiments. We showed that we can identify the unification group by measuring the decay modes of nucleon.

Free Research Field

超対称大統一理論