Supersymmetric radiative corrections at collider energies

研究结果可归纳如下：1.我们提出了一个新的方案来测试循环计算的基础上的散射振幅的不变性下的BRS变换。利用这个方案，我们计算了夸克和轻子以及规范和希格斯介子对过程e^+e^- → W^+W^-的单圈贡献。研究结果发表在Physical Review D.2上。本文研究了最小超对称标准模型（MSSM）单圈有效Higgs势中CP破坏的效应。环效应对Higgs玻色子的衰变分支分数有显著影响，从而影响Higgs玻色子在LHC上的可观测性。研究结果发表在Physical Review D.3上。对在未来的e^+e^-直线对撞机和光子直线对撞机上精确测量Higgs玻色子耦合的前景进行了研究。定量地估计了这些测量的精度，并提出了利用激光偏振测量希格斯玻色子CP性质的方法。研究结果发表在European Physical Journal C和Physical Review D.4上。系统地研究了精密电弱测量和μ介子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《物理快报B》上。

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.