Measurement of Higgs couplings and self-coupling at the ILC
Measurement of Higgs couplings and self-coupling at the ILC
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DOI：
10.22323/1.180.0316
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发表时间：
2013-11
期刊：
影响因子：
--
通讯作者：
J. Tian;K. Fujii
中科院分区：
文献类型：
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作者：
J. Tian;K. Fujii
在标准模型（SM）中，一旦给出了相关粒子的质量以及希格斯玻色子的质量，希格斯玻色子与SM粒子及其本身的耦合（自耦合）就是唯一指定的。在未来的对撞机实验中对这些耦合的精确测量是验证 SM 中电弱对称破缺机制或揭示 SM 以外物理学的关键。本文概述了如何在国际对撞机上测量各种希格斯耦合。重点是 ILC 能够完全独立于模型测定绝对 HZZ 和 HWW 耦合、希格斯总宽度，以及其他各种希格斯耦合，这些耦合基本上涵盖了所有关键耦合，包括顶优川耦合 Htt 和三线性希格斯自耦合 lHHH。在 ILC 上获得最佳精确测量的策略是分阶段运行，为不同的产生通道和不同的能量提供许多独立的 s Br 测量。讨论了一种全局拟合方法，以利用所有可用信息并得出综合精度。
In the Standard Model (SM) the couplings of the Higgs boson to SM particles and itself (selfcouplings) are uniquely specified once the masses of the particles in question as well as the Higgs boson mass are given. Precision measurements of these couplings in the future collider experiments are the key to either verifying the mechanism of the electroweak symmetry breaking in the SM or uncovering physics beyond the SM. This article gives an overview of how various Higgs couplings will be measured at the ILC. Emphasis is put on the ILC’s capability of performing fully model independent determination of absolute HZZ and HWW couplings, the Higgs total width, and hence various other Higgs couplings, which cover essentially all the crucial ones including the top-Yukawa coupling Htt and the trilinear Higgs self-coupling lHHH . The strategy to get the best precision measurements at the ILC is through staged running, which provides many independent s Br measurements for different production channels and at different energies. A method of global fitting is discussed to utilize all of the available information and to derive combined precisions.