Supersymmetric radiative corrections at collider energies

对撞机能量的超对称辐射校正

• 批准号: 10640293
• 负责人: HAGIWARA Kaoru
• 金额: $ 1.34万
• 依托单位: High Energy Accelerator Research Organization
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640293/
• 关键词: 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

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.

研究结果可以概括如下。基于BRS变换下散射振幅的不变性，提出了一种新的验证环路计算的方案。利用该方案，我们完成了从夸克和睡眠子，以及从规范和希格斯粒子到e^+e^-→W^+W^-过程的单回路贡献的计算。研究结果发表在《物理评论D.2》上。我们研究了最小粒子单环有效希格斯势中CP违逆的影响。超对称标准模型（MSSM）。环效应会显著影响希格斯玻色子的衰变分支分数，并影响其在大型强子对撞机上的可观测性。研究结果发表在《物理评论D.3》上。研究了在未来的e^+e^- linfear对撞机和光子线性对撞机上精确测量希格斯玻色子耦合的前景。对这些测量的精度进行了定量估计，并提出了利用激光偏振来测量希格斯玻色子的CP特性。研究结果发表在《欧洲物理杂志C》和《物理评论D.4》上。系统地研究了精密电弱测量和μ子g-2测量对超对称粒子的约束。研究结果发表在《核物理学B》和《物理通讯B》上。

项目成果

K.Hagiwara 他: "Measuring the Higgs CP Property through Top Quark Pair Production at photon linear colliders"Phys. Rev. D. 62. 115005 (2000)

K. Hagiwara 等人：“通过光子线性对撞机的顶夸克对产生测量希格斯 CP 特性”Phys Rev. D. 62. 115005 (2000)

K.Hagiwara 他: "Gold-plated processes at photon cdliders"Nucl. Iustrum. Meth.. A472. 100-120 (2001)

K. Hagiwara 等人：“光子 cdlider 的镀金工艺”Nucl. 100-120 (2001)。

S,Alam,K.Hagiwara: "One-loop sfermion corrections to e^+e^-→W^+W^-"Phys,Rev.. D62. 095011 (2000)

S,Alam,K.Hagiwara：“对 e^+e^-→W^+W^- 的单环费米子修正”Phys，Rev.. D62 (2000)。

K.Hagiwara 他: "Supersymmetric contributions to muon g-2 and the electroweak precision measurements"Phys. Lett.. B514. 123-130 (2001)

K. Hagiwara 等人：“超对称对 μ 子 g-2 和电弱精密测量的贡献”Phys.B514。

G.C.Cho, K.Hagiwara: "SUPERSYMMETRY VERSUS PRECISION EXPERIMENTS REVISITED"Published in Nucl.Phys.. B574. 623-674 (2000)

G.C.Cho、K.Hagiwara：“超对称与精密实验的重新审视”发表于 Nucl.Phys.. B574。