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arXiv 2012.01440hep-ph
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新物理对Higgs衰变到$Zγ$的贡献

On New Physics Contributions to the Higgs Decay to $Zγ$

Paul Archer-Smith, Daniel Stolarski, Roberto Vega-Morales

摘要:

我们探索新的物理模型,可以产生大的(100%或更多)增强希格斯衰变到$Zγ$的速度,同时仍然与其他测量一致。我们表明,这是不可能的,在简单的模型与一个额外的多重峰,也在动机良好的模型,如MSSM和折叠超对称性。我们确实发现了带有几个多重态的模型,这些多重态携带电弱电荷,这种增强是可能的,但它们需要相消干涉效应。我们还表明,在希格斯衰变到四轻子的运动学测量可以敏感,这样的模型。最后,我们探讨了超对称模型的四轻子测量的灵敏度,并发现,虽然测量是困难的高亮度LHC,它可能与未来的高能强子对撞机。

英文摘要:

We explore models of new physics that can give rise to large (100% or more) enhancements to the rate of Higgs decay to $Zγ$ while still being consistent with other measurements. We show that this is impossible in simple models with one additional multiplet and also in well motivated models such as the MSSM and folded SUSY. We do find models with several multiplets that carry electroweak charge where such an enhancement is possible, but they require destructive interference effects. We also show that kinematic measurements in Higgs decay to four leptons can be sensitive to such models. Finally we explore the sensitivity of four lepton measurements to supersymmetric models and find that while the measurement is difficult with the high luminosity LHC, it may be possible with a future high energy hadron collider.

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