Novel Nuclear Physics using Hadrons

1986 Fiscal Year Final Research Report Summary

• Project/Area Number: 59340015
• Research Category: Grant-in-Aid for Co-operative Research (A)
• Allocation Type: Single-year Grants
• Research Field: 核・宇宙線・素粒子
• Research Institution: University of Tokyo
• Principal Investigator: NISIMURA Keigo Institute for Nuclear Study, Univ. of Tokyo; Professor, 原子核研究所, 教授 (20025258)
• Co-Investigator(Kenkyū-buntansha): YAGI Kohsuke Institute of Physics, Univ. of Tsukuba; Professor, 自然科学系, 教授 (60028107) ; TAMAGAKI Ryozo Faculty of Science, Kyoto Univ.; Professor, 理学部, 教授 (30027338) ; IKEGAMI Hidetsugu Research Center of Nuclear Physics, Osaka Univ.; Professor, 核物理研究センター, 教授 (00016031) ; KONDO Michiya Research Center of Nuclear Physics, Osaka Univ.; Professor, 核物理研究センター, 教授 (90028100) ; EJIRI Hiroyasu Faculty of Science, Osaka Univ.; Professor, 理学部, 教授 (80013374)
• Project Period (FY): 1984 – 1986
• Keywords: Hadron Physics / High Energy Accelerator / High Intensity Accelerator / Unstable Nuclei Beam / Quark / グルオン多体系

Research Abstract

Nucleons have been considered as the fundamental particles composed an atomic nucleus in the study of nuclear physics. The standard description of nucleus has used only bound nucleons and vertical mesons exchanged between these nucleons. But a nucleon is a composite particle consist of quarks and gluons. And there are a few phenomena which suggest a necessity to consider a nucleus not as a many nucleons system, but as a many hadron (or quark/gluon) system. Until now, studies of nucleus have been limited in a surface region of nucleus and we have few information of the innermost region of nucleus. But recent understanding of the physical world including cosmological fields require the deeper and comprehensive study of the atomic nucleus. The systematic study of the aspects of nucleus as a composite quark/guruon system will be create a new and productive field of 'hadron physics'. The theme of our study group have been to study the capability to address the frontiers of nuclear physics. We have studied these subjects on a point of view of physics and on the side of accelerators and its related problems.
In these fields of physics, we considered mainly such subjects as folows:
1) Hypernuclear physics which studies the nucleus using a new dimension.
2) The response of nuclear matter at extreme temperature and density has been identified as a particularly attractive way to address quark/gluon physics.
3) A broad array of beams will serve research problems using kaons, pions, protons, antiprotons, muons and neutrinos.
4) The key importance of heavy ion in the study of the new field of hadron physics are recognized.
Based on those discussion of the new and productive field of hadron physics, we have proposed a high-energy, high-intensity proton beam and high-energy heavy ion beam up to Urenium.