structure of double strangeness nuclei and its interaction

2019 Fiscal Year Final Research Report

• Project/Area Number: 16H03995
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kyushu University (2017-2019); Institute of Physical and Chemical Research (2016)
• Principal Investigator: Hiyama Emiko 九州大学, 理学研究院, 教授 (10311359)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Keywords: ハイパー核 / 少数多体系物理

Outline of Final Research Achievements

To understand Baryon-Baryon interaction in unified way, we have studied S=-2 hyperon-hyperon interaction. In detail, we focused on NNΞ and NNNΞ three- and four-body systems which has never been observed. As for ΞN interaction, we employed ΞN potential with basis on Lattice QCD,which is one of ab-initio calculation. As a result, there was no bound state for NNΞ three-body system. On the other hand,we had a bound state for NNNΞ four-body system. We propose to perform heavy ion reaction to observe it. We published pupress release in March in 2020.

Free Research Field

原子核理論

Academic Significance and Societal Importance of the Research Achievements

本プロジェクトにより、第一原理計算による信頼できるグザイー核子間相互作用を活用し、軽い原子核であるテトラ・グサイ原子核（核子が３つとグザイ粒子が１つ）の束縛状態の可能性を予言し、実験の可能性を指摘した。この原子核が将来、実験で存在を確定された時には、グザイー核子相互作用の詳細を理解することにつながる。また、この相互作用は中性子星の内部構造の研究に重要な役割を行うことが期待される。