| Project/Area Number |
10640293
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
HAGIWARA Kaoru KEK, IPNS, Associate Professor, 素粒子原子核研究所, 助教授 (50189461)
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| Project Period (FY) |
1998 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| 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)
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| Keywords | Collider / 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 |
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| 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.
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