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arXiv 1403.7191hep-ph
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Higgs耦合的精确测量:对新物理尺度的意义

Precision Measurements of Higgs Couplings: Implications for New Physics Scales

C. Englert, A. Freitas, M. Muhlleitner, T. Plehn, M. Rauch, M. Spira, K. Walz

摘要:

最近发现的希格斯玻色子的测量特性与标准模型的预测非常一致。然而,希格斯耦合中的小偏差可能会表现出来,一旦目前的大不确定性将作为LHC计划的一部分得到改善,并在未来的希格斯工厂。我们审查典型的新的物理场景,导致可观察到的修改希格斯相互作用。它们可以分为两大类:混合效应,如门户模型或扩展希格斯扇区,以及来自新物质或规范场的顶点环效应。在每个模型中,我们将耦合偏差与其有效的新物理尺度联系起来。事实证明,在百分之一级的精度下,希格斯耦合将对多TeV的区域敏感。

英文摘要:

The measured properties of the recently discovered Higgs boson are in good agreement with predictions from the Standard Model. However, small deviations in the Higgs couplings may manifest themselves once the currently large uncertainties will be improved as part of the LHC program and at a future Higgs factory. We review typical new physics scenarios that lead to observable modifications of the Higgs interactions. They can be divided into two broad categories: mixing effects as in portal models or extended Higgs sectors, and vertex loop effects from new matter or gauge fields. In each model we relate coupling deviations to their effective new physics scale. It turns out that with percent level precision the Higgs couplings will be sensitive to the multi-TeV regime.

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