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Higher Order Corrections in Electroweak Processes and Possibilities of New Models

Research Project

Project/Area Number 05640351
Research Category

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

Allocation TypeSingle-year Grants
Research Field 素粒子・核・宇宙線
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

KODAIRA Jiro  Hiroshima University, Department of Physics Associate Professor, 理学部, 助教授 (40127080)

Co-Investigator(Kenkyū-buntansha) ONOGI Tetsuya  Hiroshima University, Department of Physics Research Associate, 理学部, 助手 (70211802)
MUTA Taizo  Hiroshima University, Department of Physics Professor, 理学部, 教授 (80025353)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥400,000 (Direct Cost: ¥400,000)
KeywordsStandard Model / Field Theory / Radiative Correction / QCD / Symmetry Breaking / 対称性の自発的破れ
Research Abstract

The aim of this project is to investigate the quantum effects in various models as well as theoretical problems involved.
The gammagamma collider is an interesting idea since there are processes which reveal the self couplings of gauge fields at the tree level. So in view of experimental feasibility, we propose a method to measure the beam polarizations and the luminosity of gammagamma colliders. We examine also the radiative corrections to the mass of the lightest Higgs boson in the minimal super-symmetric standard model. We find that the higher order corrections to the Higgs boson mass are non-negligible.
Before considering new models, it is necessary to understand fully the quantum effects in the standard model. However the higher order calculation is so complicated and difficult. It seems that a calculational method which keeps the gauge invariance at each stage of calculation is helpful. We show that the background field method is a simple way of deriving the same gauge invariant results which are obtained by the pinch technique. We next apply the pinch technique to the process e^-gamma*W^-upsiron to study the effects of the higher-order corrections to WWgamma three gauge boson vertex.
The spin dependent quantities may prvide us with useful information. So, we investigate the spin structure of nucleons. The twist-3 operators are carefully examined and their relations are revealed.
We also study the dynamical origin of CP violation in electroweak theory in the context of the composite Higgs models. The phase structure of four-fermion theories is also investigated with space-time curvature, temperature and chemical potentials.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report

Research Products

(30 results)

All Other

All Publications

  • [Publications] Yoshiaki Yasui: "Measuring the beam polarizations and the luminosity at photon-photon colliders." Nuclear Instruments and Methods in Physics Research A. 335. 385-396 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro Kodaira: "Mass of the lightest supersymmetric higgs boson beyond the leading logarithm approximation." Physical Review D. 50. 7035-7041 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Shoji Hashimoto: "Background field method : Alternative way of deriving the pinch technique's results." Physical Review D. 50. 7066-7076 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro Kodaira: "Spin structure function g_2(x,Q^2) and twist-3 operators in QCD." Physics Letters B. 344. 348-354 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro Kodaira: "More on the Burkhardt-Cottingham sum rule in QCD." Physics Letters B. 345. 527-537 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro Kodaira: "Perturbative QCD and nucleon structure functions." Progress of Theoretical Physics Supplement. 1995.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro Kodaira: "One-loop correction to the γWW vertex in the e^-γ collider." Proceedings. 1995.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Hashimoto: "Dynamical CP violation in composite Higgs models." Physical Review D. 48. 1301-1309 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Inagaki: "Nambu-Jona-Lasinio model in curved space-time." Modern Physics Letters A. 8. 2117-2123 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Muta: "Two-dimensional higher derivative quantum gravity with constant-curvature constraint." Progress of Theoretical Physics. 90. 247-255 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Inagaki: "Phase structure of four-fermion theories at finite temperature and chemical potential in arbitrary dimensions." International Journal of Modern Physics A. 10. 2241-2268 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Yoshiaki YASUI,Isamu WATANABE,Jiro KODAIRA and Ichita ENDO: "Measuring the Beam Polarizations and Luminosity at Photon-Photon Colliders." Nuclear Instruments and Methods in Physics Research. A335. 385-396 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro KODAIRA,Ken SASAKI and Yoshiaki YASUI: "Mass of the Lightest Supersymmetric Higgs Boson beyond the Leading Logarithm Approximation." Physical Review. D50. 7035-7041 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Shoji HASHIMOTO,Jiro KIDAIRA,Ken SASAKI and Yoshiaki YASUI Background Field Method: "Alternative Way of Deriving the Pinch Technique's Results." Physical Review. D50. 7066-7076 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro KODAIRA,Tsuneo UEMATSU and Yoshiaki YASUI: "Spin Structure Function g_2 (x, Q^2) and Twist-3 Operators in QCD." Physics Letters. B344. 348-354 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro KODAIRA,Satoshi MATSUDA,Ken SASAKI and Tsuneo UEMATSU: "More on the Burkhardt-Cottingham Sum Rule in QCD." Physics Letters. B345. 527-531 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro KODAIRA: "Perturbative QCD and Nucleon Structure Functions." to appear in the Proceedings of YITP Workshop on "From Hadronic Matter to Quark Matter : Evolving View of Hadronic Matter" (Kyoto, 1994). eds.T.Matsui et.al (Prog.Theor.Phys.Supplement, 1995).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro KODAIRA,Hiroshi TOCHIMURA,Isamu WATANABE and Yoshiaki YASUI: "One-loop Correction to the gammaWWVertex in the e-gamma Collider." to appear in the Proceedings of INS Workshop on "Physics of e^+e^-, e^-gamma and gammagamma collisions at linear accelerators" (Tokyo, 1994).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.HASHIMOTO,T.INAGAKI and T.MUTA: "Dynamical CP Violation in Composite Higgs Models." Physical Review. D48. 1301-1309 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.INGAKI,T.MUTA and S.D.ODINTSOV: "Nambu-Jona-Lasinio Model in Curved Space-Time" Modern Physics Letters A. 8. 2117-2123 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.MUTA and S.D.ODINTSOV: "Two-Dimensional Higher Derivative Quantum Gravity with Constant-Curvature Constraint." Progress of Theoretical Physics. 90. 247-255 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.INGAKI,T.KOUNO and T.MUTA: "Phase Structure of Four-Femion Theories at Finite Temperature and Chemical Potential in Arbitrary Dimensions." International Journal of Modern Physics A. 10. 2241-2268 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Jiro Kodaira: "Mass of the lightest supersymmetric higgs boson beyond the leading logarithm approximation." Physical Review D. 50. 7035-7041 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Shoji Hashimoto: "Bachground field method:Alternative way of deriving the pinch technique's results." Physical Review D. 50. 7066-7076 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Jiro Kodaira: "Spin structure function g_2(X,Q^2) and twist-3 operators in QCD." Physics Letters B. 344. 348-354 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Jiro Kodaira: "More on the Burkhardt-Cottingham sum rule in QCD." Physics Letters B. 345. (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Jiro Kodaira: "Perturbative QCD and nucleon structure functions." Progress of Theoretical Physics Supplement.

    • Related Report
      1994 Annual Research Report
  • [Publications] Yoshiaki Yasui: "Measuring the beam polarizations and the luminosity at photon-photon colliders" Nuclear Instruments and Methods in Physics Research A. 335. 385-396 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Hashimoto: "Dynamical CP violation in composite Higgs models" Physical Review D. 48. 1301-1309 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Inagaki: "Nambu-Jona-Lasinio model in curved space-time" Modern Physics Letters A. 8. 2117-2123 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-03-31   Modified: 2016-04-21  

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