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Unified theories of elementary particles based on supersymmetric string models

Research Project

Project/Area Number 61540200
Research Category

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

Allocation TypeSingle-year Grants
Research Field 核・宇宙線・素粒子
Research InstitutionTokyo Institute of Technology

Principal Investigator

SAKAI Norisuke  Tokyo Institute of Technology, Assoc. Prof., 理学部, 助教授 (80108448)

Co-Investigator(Kenkyū-buntansha) INAMI Takeo  Kyoto University, Assoc. Prof., 基礎物理学・研究所, 助教授 (20012487)
ISO Chikashi  Tokyo Institute of Technology, Prof., 理学部, 教授 (90016030)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1987: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1986: ¥600,000 (Direct Cost: ¥600,000)
KeywordsSuperstring / Unified theory / Hawking radiation / Supersymmetry / Quantum gravity / Effective interaction / Conformal invariance / モジュラー形式
Research Abstract

We have investigated various problems in constructing unified theories of elementary particles based on supersymmetric string models.
Supersymmetry was proposed to solve the gauge hierarchy problem in grand unified theories. In order to include gravity into the unified theory, superstring theories are most promising. We have examined the so-called Hawking radiation in string theories. More concretely, we put strings in a strong uniform gravitational field and observed that there is an upper limit above which the gravitational field cannot be made stronger because of violent particle production in the strong gravitational field.
At low energies, superstring theories look like a system of supersymmetric Yang-Mills fields coupled to supergravity fields with systematic corrections in powers of the slope parameter and the string loop expansion parameter. We have explicitly worked out the one-loop correction (torus topology) to the effective Lagrangian in the case of heterotic string as well as type II superstring.

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] N,Sakai: Particles and Nuclei (World Scientific,1986).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] N.Sakai and Y,Tanii: Nucl.Phys.B287. 457-476 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] H,Ooguri and N,Sakai: Phys.Lett.B197. 109-114 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M,Abe;H,Kubota and N,Sakai: Phys,Lett.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] N. Sakai: "Hawking Radiation in String Theories" Particles and Nuclei (World Scientific, 1986).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] N. Sakai and Y. Tanii: "One-Loope Amplitudes and Effective Action in Superstring Theories" Nucl. Phys.B287. 457-476 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] H. Ooguri and N. Sakai: "String Loop Corrections from Fusion of Handles and Vertex operators" Phys. Lett.B197. 109-114 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M. Abe, H. Kubota and N. Sakai: "Loop Corrections to the Heterotic String Effective Lagrangian" Phys. Lett.in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] N.Sakai: Essays in Honor of the 60th Birthday of Professor Yoshio Yamaguchi.

    • Related Report
      1986 Annual Research Report
  • [Publications] N.Sakai: Nuclear Physics B.

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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