1996 Fiscal Year Final Research Report Summary
Symmetry Breaking and Its Applications in Particle Physics
| Project/Area Number |
06640396
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | OSAKA UNIVERSITY |
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Principal Investigator |
HIGASHIJIMA Kiyoshi Osaka University, Graduate School of Science, Department of Physics, Professor, 大学院・理学研究科, 教授 (10092313)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Minoru Osaka University, Graduate School of Science, Department of Physics, Research As, 大学院・理学研究科, 助手 (70273729)
NAKATSU Toshio Osaka University, Graduate School of Science, Department of Physics, Research As, 大学院・理学研究科, 助手 (10281502)
KUBOTA Takahiro Osaka University, Graduate School of Science, Department of Physics, Associate P, 大学院・理学研究科, 助教授 (80161678)
OHTA Nobuyoshi Osaka University, Graduate School of Science, Department of Physics, Associate P, 大学院・理学研究科, 助教授 (90167304)
TAKASUGI Eiichi Osaka University, Graduate School of Science, Department of Physics, Professor, 大学院・理学研究科, 教授 (00135633)
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| Project Period (FY) |
1994 – 1996
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| Keywords | symmetry breaking / spontaneous breaking / chiral symmetry |
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| Research Abstract |
Symmetry breaking in field theory is caused by some instability. Instability in one-particle problem triggers classical instability. In classically stable systems, symmetry sometimes breaks down by quantum instability. In these cases, instability does not show up unless one examines bound state spectrum. Relativistic bound states problems have various difficulties since we have to renormalize the theory in non-purturbative way. In asymptotic free field theory, however, we can overcome these difficulties. When the attractive force between massless quark and anti-quark is strong enough to make a bound state, the perturbative vacuum becomes unstable and quark acquires mass. We also investigated some phenomenological implications.
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