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Superstring Theory and Low-Energy Physics

Research Project

Project/Area Number 02640223
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 核・宇宙線・素粒子
Research InstitutionNagoya University

Principal Investigator

MATSUOKA Takeo  Nagoya University, Faculty of Science, Associate Professor., 理学部, 助教授 (90022722)

Co-Investigator(Kenkyū-buntansha) MATSUDA Masahisa  Aichi University of Education, Faculty of Education, Associate Professor., 教育学部, 助教授 (30111868)
SAWADA Shoji  Nagoya University, Faculty of Science, Professor., 理学部, 教授 (50022546)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1991: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1990: ¥600,000 (Direct Cost: ¥600,000)
KeywordsSuperstring Theory / Conformal Invariance / Compactification / Supersymmetry / Yukawa Coupling / R-Parity Violation / Gauge Hierarchy / Generation Mixing / カラビ-ヤウのコンパクト化
Research Abstract

Superstring theory is the most promising unified theory. In this theory the space-time dimension should be more than four so that the theory becomes consistent at quantum level. Four-dimensional effective theory is derived after the compactification through which the extra-dimensional space becomes a conformal invariant comactified manifold dynamically. In this theory topological and geometrical structure of the manifold is closely related to various properties of the low-energy effective theory such as gauge symmetries, matter fields and their couplings. Therefore, it is of critical importance to clarify the relation between the structure of compactified manifold and low-energy effective theory. In this proposed spontaneous deformation of conformal invariant manifold and using this mechanism we investigated viable effective theory from calabi-Yau superstring. We studied characteristic features of the effective theory and expected new phennomena at the electroweak scale.
1. We found realistic solutions in which the proton stability is guaranteed and the unification of gauge couplings is realized.
2. We pointed out the possibility that R-parity is spontaneously broken at TeV scale. Chargino and neutralino mass spectra are calculated and the lightest masses among them are predicted to be less than weak boson masses. Furthemore, we discussed the generation number and the structure of flavor mixing.
3. In the two-Higgs-doublet model expected from the supersymmetric model, it is found that the charged Higgs contribution can give a sizable enhancement to the branching fractions of B-meson charamless decay.
4. We studied the stability of quantum chiral solitions coupled with the vector mesons.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] Masayasu HARADA et al: "The Gauge Unification in a Four-Generation Superstring Model." Prog.Theor.Phys.83. 961-967 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Chuichiro HATTORI et al: "Ghargino and Neutralino Mass Spectra in Supestring-Insspired E_6 Model with R-Parity Violation." Prog.Theor.Phys.86. 725-743 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Chuichiro HATTORI et al: "Neutrino Masses and Generation Number in the Superstring Inspired E_6 Model with Spontaneous R-Parity Violation." Phys.Rev.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Akizo KOBAYASHI et al: "Instabiliy of Chial Soliton Stabilized by Quantization of Breathign Mode." Phys.Rev.D. 42. 1868-1871 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hiroshi IMAI et al: "Four-Phase Structure of ρ Meson Coupled Skyrmions on S^3." Prog.Theor.Phys.85. 615-629 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Shoji SAWADA et al: "Stability of Quantized Chiral Soliton with the Shyrme Term." Phys.Rev.D. 44. 1578-1584 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Keyan YANG et al: "Stability of Quantized Chiral Solition Coupled with the ρ Meson."

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Akizo KOBAYASHI et al: "Stability of Chiral Solitons."

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] A.J.DAVIES et al: "Penguin effects induced by the Two-Higgs-Doublet Model and Charmless B-Meson.Decays." Z.Phys.C. 52. 97-103 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] A.J.DAVIES et al: "Exact Calculation of the Scalar-Induced gluonic Penguin Diagram in the Two-Higgs-Doublet Model." Rhys.Rev.D. 44. 2114-2117 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Harada et al: "The Gauge Unification in a Four-Generation Superstring Model." Prog. Theor. Phys.83. 961-967 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] C. Hattori et al: "Chargino and Neutralino Mass Spectra in Superstring-Inspired E_6 Model with R-Parity Violation." Prog. Theor. Phys.86. 725-743 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] C. Hattori et al: "Neutrino Masses and Generation Number in the Superstring Inspired E_6 Model with Spontaneous R-Parity Violation." Phys. Rev.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] A. Kobayashi et al: "Instability of Chiral Soliton Stabilized by Quantization of Breathing Mode." Phys. Rev.D 42. 1868-1871 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Imai et al: "Four-Phase Structure of rho Meson Coupled Skyrmions on S^3." Prog. Theor. Phys.85. 615-629 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Sawada et al: "Stability of Quantized Chiral Soliton with the Skyrme Term." Phys. Rev.D 44. 1578-1584 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K. Yang et al: "Stability of Quantized Chairal Soliton Coupled with the rho Meson."

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] A. Kobayashi et al: "Stability of Chiral Solitons."

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] A. J. Davies et al: "Penguin Effects Induced by the Two-Higgs-Doublet Model and Charmless B-Meson Decays." Z. Phys.C 52. 97-103 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] A. J. Davies et al: "Exact Calculation of the Scalar-Induced Gluonic Penguin Diagram in the two-Higgs-Doublet Model." Phys. Rev. D 44. 2114-2117 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Chuichiro HATTORI et al.: "Chargino and Neutralino Mass Spectra in SuperstringーInspired E_6 Model with RーParity Violation." Progress of Theoretical Physics. 86. 725-743 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Chuichiro HATTORI et al.: "Neutrino Masses and Generation Number in the Superstring Inspired E_6 Model with Spontaneous RーParity Violation." Physical Review D.

    • Related Report
      1991 Annual Research Report
  • [Publications] Sohji SAWADA et al.: "Stability of Quantized Chiral Soliton with the Skyrme Term." Physical Review D. 44. 1578-1584 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Keyan YANG et al.: "Stability of Quantized Chiral Soliton Coupled with the ρ Meson."

    • Related Report
      1991 Annual Research Report
  • [Publications] Akizo KOBAYASHI et al.: "Stability of Chiral Solitons." Progress of Theoretical Physics Supplement.

    • Related Report
      1991 Annual Research Report
  • [Publications] A.J.Davies et al.: "Penguin Effects Induced by the TwoーHiggsーDoublet Model and Charmless BーMeson Decays." Z.Phys.C. 52. 97-103 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] A.J.Davies et al.: "Exact Calculation of the ScalarーInduced Gluonic Penguin Diagram in the TwoーHiggsーDoublet Model." Physical Review D. 44. 2114-2117 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] M.Harada: "The Gauge Unification in a FourーGeneration Superstring Model" Progress of Theoretical Physies. 83. 961-967 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] C.Hattori: "Chargino and Neutralino Spectra in a SuperstringーInspired E_6 Model"

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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