強い相互作用とハドロン物理学

1989 Fiscal Year Annual Research Report

• Project/Area Number: 63302010
• Research Institution: Nagoya University
• Principal Investigator: 沢田 昭二 名古屋大学, 理学部, 助教授 (50022546)
• Co-Investigator(Kenkyū-buntansha): 大槻 昭一郎 九州大学, 理学部, 教授 (80037142) ; 吉川 圭二 大阪大学, 理学部, 教授 (10011545) ; 玉垣 良三 京都大学, 理学部, 教授 (30027338) ; 福田 礼次郎 慶応義塾大学, 理工学部, 助教授 (10027352) ; 高木 富士夫 東北大学, 理学部, 助教授 (20004343)
• Keywords: QCD / カラ-自由度 / 閉じこめの機構 / 格子ゲ-ジ理論 / スキルメ模型 / クオ-ク・グル-オン・プラズマ

Research Abstract

1.量子クロモカ学(QCD)を基礎に非摂動的効果をとり入れる手法としてインバ-ジョン法を開発して、カイラル対称性の破れおよびカラ-自由度の閉じこめの機構を研究しカラ-電磁束を具体的に求める、クォ-ク間に働く力のバネ係数を得た。
2.低エネルギ-領域の有効理論である非線形シグマ模型とQCDとの関係をヴェス・ズミノ項などを手がかりに研究した。また、ブリ-ジングモ-ドの量子化によるソリトンの安定化の可能性の模索および湯川相互作用および核力を導出し従来の理論との比較がおこなわれ、H粒子などストレンジネスを持つ系への適用が進められた。
3.格子ゲ-ジ理論にもとづいて、様々な近似法を用いてゲ-ジ理論の相構造、カイラル対称性が自発的に破れた相とその破れが回復する相との間の相転移が起きる臨界点、およびこの相転移の種類がしらべられた。また電算機を用いたシミュレ-ションによるQCDの研究を発展させた。
4.有限温度のQCDにもとづいてクォ-クグル-オン・プラズマや高密度物質の研究が宇宙の初期過程のモデルと関連しておこなわれた。
5.SLC,LEPなどの新しい実験結果と合せてCP不変性の破れ、ボトム粒子の崩壊、トップ・クォ-クの質量、ワインバ-グ角などの関連した研究がおこなわれた。またQCDを含む相互作用と物質の統一模型、標準模型を超える理論の模索がコンフォ-マル場の理論、超弦模型などとも合せて研究された。

Research Products

• [Publications] I.Slaus: "Neutron-Neutron Effective Range Parameters." Phys.Report. 173. 257-300 (1989)
• [Publications] Khin Swe Myint: "Σ-Hypernuclear States in ^<208>Pb." Prog.Theor.Phys.82. 112-118 (1989)
• [Publications] T.Harada: "Structure of the ^4_ΣHe Hypernuclear State." Nucl.Phys.A. (1990)
• [Publications] T.Harada: "Formation of ^4_ΣHe Hypernucleus by In-Flight K^ー Capture." Phys.Letters B. (1990)
• [Publications] S.Okabe: "Light Σ-Hypernuclei and α-Clustering." Nucl.Phys.A. (1990)
• [Publications] C.Ishii: "Nuclear Effects in the Semi-Inclusive Cross Section of High Energy Neutrino-Nucleus Interactions." Phys.Lett.B. 216. 409-412 (1989)
• [Publications] H.Kouno: "Excluded Volume,Bag Constant and Hadron-Quark Phase Transition." Z.Phys.C. 42. 209-213 (1989)
• [Publications] H.Kouno: "A Consistent Formulation of the Excluded Volume Effect in Hadron Gas at High Densities." Z.Phys.C. 45. 43-46 (1989)
• [Publications] H.Imai: "Multi-Skyrmion with ρ and ω Mesons." Prog.Theor.Phys.82. 141-152 (1989)
• [Publications] T.Sawada: "Anomaly of the Pion-Pion Phase Shift." Physics Letters B. 225. 291-295 (1989)
• [Publications] T.Sawada: "Comments on QED of Large Coupling Constant." Hadronic Journal. 13. (1990)
• [Publications] K.Shimizu: "Study of Baryon-Baryon Interaction and Nuclear Properties in the Quark Cluster Model." Reports on Progress in Physics. 52. 1-56 (1989)
• [Publications] K.Shimizu: "Cluster Models and Subnuclear Degrees of Freedom." J.Phys.Soc.Japan Suppl.58. 456-471 (1989)
• [Publications] T.Shigehara: "The Continuum RPA with the Exchange Term Explicitly Included and Its Applications to the Spin-Isospin and Longitudinal Response Functions." Nucl.Phys.A. 492. 388-410 (1989)
• [Publications] S.Takeuchi: "Nucleon-Nucleon Interactions in the Quark Cluster Model." Nucl.Phys.A. 504. 777-796 (1989)
• [Publications] T.Shigehara: "Isoscalar Spin Response Functions in the Quasielastic Scattering Region." Nucl.Phys.A.
• [Publications] S.Fleck: "A Sigma-Omega-Quark Model to Saturate Nuclear Matter." Nucl.Phys.A.
• [Publications] Y.Koike: "Study of Hyperon-Nucleon and Hyperon-Hyperon Interaction in the Flip-Flop Model." Nucl.Phys.A.
• [Publications] 清水清孝: "原子核におけるクォ-ク自由度の役割 -解説-" 日本物理学会誌. 44. 747-754 (1989)
• [Publications] Ken Kawarabayashi: "Yukawa Couplings in Meson-Soliton Scattering." Physics Letters B. 216. 205-211 (1989)
• [Publications] J.Arafune: "^<13>C as a solar Neutrino Detector." Physics Letters B. 217. 186-190 (1989)
• [Publications] Y.S. Hirata: "New Metastable States in Supercritical QED" Physical Review D. 39. 2813-2816 (1989)
• [Publications] H.Minakata: "Hybrid Solution of the Solar Neutrino Problem in Anticorrelation with Sunspot Activity." Physical Review Letters.63. 121-124 (1989)
• [Publications] Y.S.Hirata: "Quantum Field Theories around a Large-Z Nucleus: Metastable States in Supercritical Phase." Zeitschrift fur Physik. (1990)
• [Publications] R.Fukuda: "Implication of the Proposed Theory of Measurement." Prog.Theor.Phys.81. 34-46 (1989)
• [Publications] M.Komachiya: "Derivation of the Three-body Bound State Equation from the Effective Action." Physical Review D. 40. 2654-2661 (1989)
• [Publications] R.Fukuda: "Photon Pairing and the Strong Coupling Phase of Massive Quantum Electrodynamics" Physical Review Letters. 63. 482-485 (1989)
• [Publications] Satoshi Matsuda: "Chiral Superspace Formulation of N=4 Superconformal Algebras." Phys.Letters B. 220. 423-421 (1989)
• [Publications] W.B. Atwood: "CP Violation with Polarized Z^0." Phys.Lett.B. 232. 533-535 (1989)
• [Publications] T.Takatsuka: "Postglitch Timing Behavior of Vela and Crab Pulsars in an Extended Starquake Model for Neutron Stars with Pion-Condensed Core." Prog.Theor.Phys.82. 945-964 (1989)
• [Publications] E.Uegaki: "A New Molecular for Heavy Ion Resonances." J.Phys.Soc.Japan. 58. 330-337 (1989)
• [Publications] E.Uegaki: "On Resonances of the ^<24>Mg-^<24>Mg System." Phys.Lett.B. 231. 28-34 (1989)
• [Publications] T.Tazawa: "Resonances due to Landau-Zener Transition." Phys.Rev.C,Rapid Communication. (1990)
• [Publications] T.Eguchi: "Superconformal Algebras and String Compactification on Manifolds with SU(N) Holonomy." Nucl.Phys.B. 315. 193-221 (1989)
• [Publications] I.-G.Koh: "Scalar Field Theories for Z_N Symmetric Conformal Models." Phys.Lett.B. 223. 349-352 (1989)
• [Publications] T.Eguchi: "Deformations of Conformal Field Theories and Soliton Equations." Phys.Lett.B. 224. 373-378 (1989)
• [Publications] T.Eguchi: "Sine-Gordon Theory at Rational Values of the Coupling Constant and Minimal Conformal Models." Phys.Lett.B. (1990)
• [Publications] K.Kikkawa: "Cancellation of Lorentz Anomaly of the String Field Theory in Light-Core Gauge." Nucl.Phys.B. (1990)
• [Publications] K.Kikkawa: "An Algebraic Extension of QCD_2." Prog.Theor.Phys.
• [Publications] A.Niegawa: "Path-integral Formulaton of Real-time Quantum Field Theories at Finite Temperature." Physical Review D. 40. 1199-1206 (1989)
• [Publications] N.Ashida: "Quasiparticle Structure of the Thirring Model at Finite Temperature." Physics Letters B.
• [Publications] K.Terasaki: "Approximte |△I|=1/2 Rule in K→ππ Decays and Exotic Mesons." Modern Physics Letters A. 4. 1447-1455 (1989)
• [Publications] S.Oneda: "On Broken Flavor Symmetry in Particle Physics." Physical Review D. (1990)
• [Publications] K.Terasaki: "Approximate |△I|=1/2 Rule in K→ππ Decays from Asymptotic Quark-line Diagram Approach." Physical Review D. (1990)
• [Publications] K.Terasaki: "Dominance of Long Distance Effects in the K_L-K_S Mass Difference." Mod.Phys.Lett.A. (1990)
• [Publications] K.Terasaki: "Unified Approach to Weak Decays of Strange and Charm Mesons into Two Pseudoscalar Mesons and the Role of Exotic Mesons." Physical Review D. (1990)
• [Publications] T.Hasuike: "CP-Violatins and Effects of Forth Generation in B Meson Non-leptonic Decays." Prog.Theor.Phys.83. (1990)
• [Publications] T.Hasuike: "CP Asymmetries in Nonleptonic Decays of Neutral B Mesons for Three and Four Generations." Modern Physics Lett.A. (1990)
• [Publications] T.Hasuike: "Fourth-Generation Effect on CP Violations in B_d Hadronic Decays." Physical Review D. (1990)
• [Publications] Kazuyuki Fujii: "On Classical Configuration of SU(2) Gauge-Higgs System." Prog.Theor.Phys.81. 462-472 (1989)
• [Publications] K.Funakubo: "Sphalerons of 0(3) Nonlinear Sigma Model on a Circle." Prog.Theor.Phys.83. (1990)
• [Publications] A.Hasenfratz: "Study of the 4-Component Σ^4 Model." Nucl.Phys.B. 317. 81-96 (1989)
• [Publications] K.Ikeda: "What is Cluster in Nuclear System? ーThe Development of the Viewpoint of Alpha-Cluster Correlations and Molecular Structure in Nuclear Systemー." J.Phys.Soc.Jpn.Suppl.58. 277-287 (1989)
• [Publications] T.Yamada: "Cluster Model Analysis of the ^9_ΛBe Hypernucleus." J.Phys.Soc.Jpn.Suppl.58. 733-740 (1989)
• [Publications] Y.Tosaka: "Effect of Deformation on α-Decay of ^<20>Ne." Prog.Theor.Phys. 81. 379-740 (1989)
• [Publications] T.Kajino: "Branching Rations for ^3He(α,γ) ^7Be and ^3H(α,γ) ^7Li." Phys.Rev.C. 40. 523-530 (1989)
• [Publications] T.Yamada: "Coupled-Isomultiplet Model of Σ Hypernuclei." Il Nuovo Cimento. 102A. 481-490 (1989)
• [Publications] Y.Suzuki: "New Type of Dipole Vibration in Nuclei." Prog.Theor.Phys.83. 180-184 (1990)
• [Publications] Y.Tosaka: "Structure of Neutron-Halo in the Ground State of ^<11>Li." Prog.Theor.Phys.83. (1990)
• [Publications] Satoshi Matsuda: "Proceedings of the Symposium of Perspectives of Particle Physics." World Scientific, 15 (1989)
• [Publications] G.Belanger: "Proceedings of the Summer Study on High Energy Physics in the 1990´s." World Scientific, 17 (1989)
• [Publications] R.Fukuda: "International Workshop on "New Trends in Strong Coupling Gauge Theories"." World Scientific, 11 (1988)
• [Publications] R.Fukuda: "Perspectives on Particle Physics from Mesons and Resonances to Quarks and Strings." World Scientific, 7 (1988)
• [Publications] Y.Abe: "Proc.Int.Symp.on Developments of Nuclear Cluster Dynamics" World Scientific, 16 (1989)
• [Publications] Y.Abe: "Recent Advances in Culear Physics" World Scientific, 41 (1989)
• [Publications] S.Oneda: "Proceeding of Hadron 89" World Scientific, 8 (1989)
• [Publications] K.Terasaki: "Proceedings of the Workshop on QCD and Development of Hadron Physics" World Scientific, 26 (1989)
• [Publications] K.Kikkawa: "Proc.1st Winter School on Math.Phys."Lectures on Mathematical Physics"" World Scientific, 38 (1989)
• [Publications] Ken Kawarabayashi: "Perspectives on Particle Physics" World Scientific, 10 (1989)