顶部、GigaZ、MegaW
Top, GigaZ, MegaW
摘要：
本文综述了国际直线对撞机（ILC）在探索新物理模型，特别是最小超对称标准模型（MSSM）方面的GigaZ/MegaW测量的物理潜力。我们证明了顶夸克质量m_t、W玻色子质量M_W和有效轻子弱混合角sin ^2 θ_eff在ILC上的预期实验精度将为新物理学的量子效应提供高灵敏度。特别是，一种新的更精确的sin^2 θ_eff测量方法，其实验中心值目前是从平均值中获得的，其中最精确的单个测量值相差超过三个标准差，这可能导致标准模型和最一般形式的MSSM都被排除在外。或者，精确的测量可以解决超对称粒子的虚拟效应，即使在超对称粒子如此重以至于它们在LHC和ILC的第一阶段逃避直接检测的情况下。
英文摘要：
We review the physics potential of top mass measurements and the GigaZ/MegaW options of the International Linear Collider (ILC) for probing New Physics models and especially the Minimal Supersymmetric Standard Model (MSSM). We demonstrate that the anticipated experimental accuracies at the ILC for the top-quark mass, m_t, the W boson mass, M_W, and the effective leptonic weak mixing angle, sin^2 theta_eff, will provide a high sensitivity to quantum effects of New Physics. In particular, a new and more precise measurement of sin^2 theta_eff, for which the experimental central value is currently obtained from an average where the most precise single measurements differ by more than three standard deviations, could lead to a situation where both the Standard Model and the MSSM in its most general form are ruled out. Alternatively, the precision measurements may resolve virtual effects of SUSY particles even in scenarios where the SUSY particles are so heavy that they escape direct detection at the LHC and the first phase of the ILC.
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