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Study of compactification in superstring and low energy effective theories

Research Project

Project/Area Number 14540251
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 素粒子・核・宇宙線
Research InstitutionKanazawa University

Principal Investigator

SUEMATSU Daijiro  Kanazawa University, Department of Physics, Associate Professor, 自然科学研究科, 助教授 (90206384)

Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2004: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2003: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2002: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsSuperstring / Supersymmetry / Unified theory / ニュートリノ
Research Abstract

Phenomenological features of supersymmetric models derived as low energy effective theories of superstring have been studied from various points of view. Main results obtained in this project are followings.
1. If we introduce a certain symmetry which may solve the famous doublet-triplet splitting problem, the mass of gauginos becomes nonuniversal in the framework of gauge mediation supersymmetry breaking. We studied this aspect in an SU(5) model and also the mass spectrum of superpartners. We pointed out that the feature of this spectrum was favored by the μ problem.
2. In general CP phases in the supersymmetry breaking parameters induce dangerous EDM of an electron and a neutron. We showed that the CP phases in the mass of gauginos can contribute to these EDMs in such a way that they cancel other contributions. In that case large CP phases can be allowed in the supersymmetry breaking parameters. We studied allowed parameter regions of the supersymmetry breaking parameters and discussed the possibility of light Higgs in that case.
3. We constructed a neutrino model which can realize successful leptogenesis escaping the gravitino problem. We showed that reheating temperature can be lower than the one which is required from the gravitino problem if we construct a model which realizes maximum CP asymmetry and satisfies constraints from neutrino oscillation experiments.
4. We constructed a model for baryogenesis and dark matter by using a flat direction related to the μ problem.

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (22 results)

All 2006 2005 2004 2003 Other

All Journal Article (17 results) Publications (5 results)

  • [Journal Article] Nonthermal production of baryon and dark matter2006

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Astroparticle Physics 24

      Pages: 511-519

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Dark world and baryon asymmetry from a common source2006

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Journal of Cosmology and Astroparticle Physics 01

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Sinqlino-domineted hightest supersymmetrie particle as a CDM candidate in super-summeric models with as2006

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Physical Review D 73

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Singlino-dominated lightest supersymmetric particle as a CDM candidate in supersymmetric models with an extra U(1)2006

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Physical Review D 73

    • NAID

      120000809124

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] μ-term as the origin of baryon and lepton number asymmetry2005

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Journal of Physics G 31

      Pages: 445-458

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Neutrino texture saturating the CP asymmetry2005

    • Author(s)
      Takayasu Baba
    • Journal Title

      Physical Review D 71

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] μ-term as the origin of baryon and lepton number asymmetry2005

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Journal of Physics G : Nuclear and Particle Physics 31

      Pages: 445-458

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Neutrino texture saturating the CP asymmetry2005

    • Author(s)
      Takayasu Baba, Daijiro Suematsu
    • Journal Title

      Physical Review D 71

    • NAID

      120000809032

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Garglns CP phases and EDMs in the extended gange mediation SUSY breaking2004

    • Author(s)
      D.Suematsu
    • Journal Title

      Journal of High Energy Physics 05

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] μ problem in an extended gange mediation supersymmetry breaking2004

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      The European Physical Journal C 38

      Pages: 359-366

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Gaugino CP phases and EDMs in the extended gauge mediation SUSY breaking2004

    • Author(s)
      D.Suematsu, H.Tsuchida
    • Journal Title

      Journal of High Energy Physics 05

    • NAID

      120007184071

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] μ problem in an extended gauge mediation supersymmetry breaking2004

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      The European Physical Journal C 38

      Pages: 359-366

    • NAID

      120007184065

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Gaugino CP phases and EDMs in the extended gauge mediation SUSY breaking2004

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Journal of High Energy Physics 0405

    • NAID

      120007184071

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Flevor mixing in quarks and leptons2003

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Nuclear Physics B (Proc. Suppl.) 118

      Pages: 474-474

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Soft supersqmmetry breaking masses in a unified model with doublet-thplet spliHing2003

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Physical Review D 67

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Flavor mixing in quarks and leptons2003

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Nuclear Physics B (Proc.Suppl.) 118

      Pages: 474-474

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Soft supersymmetry breaking masses in a unified model with doublet-triplet splitting2003

    • Author(s)
      Daijiro Suematsu
    • Journal Title

      Physical Review D 67

    • NAID

      120000809128

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Daijiro Suematsu: "Flavor Mixing in Quarks and Leptons"Nuclear physics B(Proc.Suppl.). 118. 474 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Daijiro Suematsu: "Soft SUSY breaking masses in a unified model with doublet-triplet splitting"Physical Review D. 67. 075020-1-075020-7 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Daijiro Suematsu: "D-term inflation and neutrino mass"Journal of High Energy Physics. 10. 014-1-014-17 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Daijiro Suematsu: "Flover mixing in guarks and leptons"Nuclear Physics B (Proceedings Supplements). 118. 474 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Daijiro Suematsu: "Soft supersymmetry breaking masses in a unified model with doublet-triplet splitting"Physical Review D. 67・7. 075020-1-075020-7 (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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