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Supersymmetric radiative corrections at collider energies

Research Project

Project/Area Number 10640293
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 InstitutionHigh Energy Accelerator Research Organization

Principal Investigator

HAGIWARA Kaoru  KEK, IPNS, Associate Professor, 素粒子原子核研究所, 助教授 (50189461)

Project Period (FY) 1998 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2001: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2000: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
KeywordsCollider / Supersymmetry / Radiatine corrections / CP riolation / Higgs boson / LHC / Elactrereak precision meesare mants / Muon g-2 / 超対称性模型 / リニアコライダー / 光子リニアコライダー / 精密実験 / ヒッグス
Research Abstract

The research results may be summarised as follows.
1. We proposed a new scheme to test the loop calculations based on the invariance of the scattering amplitudes under the BRS transformation. By using this scheme, we completed the calculation of the one-loop contributionsfrom squarks and sleptons, and those from gauge and higgs fcrmions to the process e^+e^- → W^+W^-. The results have been published in Physical Review D.
2. We studied effects of CP violation in the one-loop effective Higgs potential of the minimal .supersymmetric Standard Model (MSSM). The decay branching fractions df the Higgs bosons can be affected significantly by the loop effects, and the observability pf the Higgs boson at the LHC will be affected. The results have been published in Physical Review D.
3. Prospects of measuring the Higgs boson couplings precisely at future e^+e^- linfear colliders and photon linear colliders have been studied. Precision of those measurements have been estimated quantitatively, and the use of the laser polarizations to measure the CP property of the Higgs bosons lias been proposed. The results have been published in European Physical Journal C, and Physical Review D.
4. Constraints on supersymmetric particles from precision electroweak measurements and the muon g-2 measurements have been studied systematically. The results have been published in Nuclear Physics B and in Physics Letters B.

Report

(5 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] K.Hagiwara 他: "One-loop sfermion corrections to e^-e^+→W^-W^+ in the MSSM"Phys. Rev. D. 62. 095011 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Hagiwara 他: "Prospects of measuring general Higgs couplings at e^+e^-linear colliders"Euro. Phys. J.. C14. 457-468 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Hagiwara 他: "Measuring the Higgs CP Property through Top Quark Pair Production at photon linear colliders"Phys. Rev. D. 62. 115005 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Hagiwara 他: "Supersymmetry versus precision experiments revisited"Nucl. Phys.. B574. 623-674 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Hagiwara 他: "Supersymmetric contributions to muon g-2 and the electroweak precision measurements"Phys. Lett.. B514. 123-130 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Hagiwara 他: "The SM prediction of g-2 of the muon"Phys. Lett.. B557. 69-75 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Alam, K.Hagiwara, S.Kaiiomura, R.Szalapski, Y.Umeda: "ONE LOOP SFERMION CORRECTIONS TO e^-e^+ → W^-W^+ IN THE MSSM"Publisliecl in Pliys.Rcv.. D62. 95011 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Hcigiwara, S.Kanemura, M.Klassw, Y.Umecla: "ONE LOOP CONTRIBUTIONS OF CHARGINOS AND NEUTRALINOS TO W PAIR PRODUCTION IN e^+e^- COLLISIONS"To be published in Phys.Rev.D (e-Print Archive : hep-ph/0212135).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Y.Choi, K.Hagiwara, J.S.Lee: "HIGGS BOSON DECAYS IN THE MINIMAL SUPERSYMMETRIC STANDARD MODEL WITH RADIATIVE HIGGS SECTOR CP VIOLATION"Published in Phys.Rev.. D64. 32004 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Hagiwara, S.Ishihara, J.Kamoshita, B.A.Kniehl: "PROSPECTS OF MEASURING GENERAL HIGGS COUPLINGS AT e^+e^- LINEAR COLLIDERS"Published in Eur.Phys.J.. C14. 457-468 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] E.Asakawa, S.Y.Choi, K.Hagiwara, J.S.Lee: "MEASURING THE HIGGS CP PROPERTY THROUGH TOP QUARK PAIR PRODUCTION AT PHOTON LINEAR COLLIDERS"Published in Phys.Rcv.. D62. 115005 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] G.C.Cho, K.Hagiwara: "SUPERSYMMETRY VERSUS PRECISION EXPERIMENTS REVISITED"Published in Nucl.Phys.. B574. 623-674 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] G.C.Cho, K.Hagiwara: "SUPERSYMMETRIC CONTRIBUTIONS TO MUON g-2 AND THE ELECTROWEAK PRECISION MEASUREMENTS"Published in Phys.Lctt.. B514. 123-130 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Hagiwara: "THE SM PREDICTION OF g-2 OF THE MUON"Published in Phys.Lett.. B557. 69-75 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Hagiwara 他: "Gold-plated processes at photon cdliders"Nucl. Iustrum. Meth.. A472. 100-120 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Hagiwara 他: "Higgs boson decays in the minimal super symmetric standard model"Phys. Rev.. D64. 032004 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Hagiwara 他: "Super symmetric contributions to muong-2"Phys. Lett.. B514. 123-130 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] G.C.Cho,K.Hagiwara: "Supersymmetry versus precision measurements"Nucl.Phys. B574. 623-674 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] GiC.Cho,K.Hagiwara,M.Hayakaewa: "Muon g-2 and precision electroweak physics in MSSM"Phys,Lett.. B478. 231-238 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Hagiwara et al: "Prospects of measuring general Higgs coc-plings"Eur.Phys; J.. C14. 457-468 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S,Alam,K.Hagiwara: "One-loop sfermion corrections to e^+e^-→W^+W^-"Phys,Rev.. D62. 095011 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] E.Asakawa,K.Hagiwara: "Measuring Hu Higgs CP property"Phys.Rev.. D62. 115005 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 萩原薫 他: "Supersymmetry versus precision experiments revisited"Nuclear Physics B. B(掲載予定). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 萩原薫 他: "Muon g-2 and precision electroweak physics in the MSSM"Physics Letters B. B(掲載予定). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] S.Alam他: "Sumrules for e^+e^+→W^+W^+ helikityamplitudes from BRS invariauce" Nuclear Physics B. 541. 50-86 (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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