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arXiv 1503.04830hep-ph
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希格斯玻色子与电子耦合的实验限制

Experimental constraints on the coupling of the Higgs boson to electrons

Wolfgang Altmannshofer, Joachim Brod, Martin Schmaltz

摘要:

在标准模型(SM)中,希格斯玻色子玻色子与电子的耦合是真实的,并且非常小,与电子质量成正比。新的物理学可以显著改变这种耦合的实部和虚部。我们讨论的实验是敏感的希格斯-电子耦合,并推导出当前的新的物理界有助于这种耦合。最强的约束来自于电子电偶极矩(EDM)上的ACME约束。我们计算了电子EDM的完整解析双回路结果,并表明它将希格斯粒子-电子耦合的虚部限定为小于SM电子汤川耦合的1.7 x 10^-2倍。实部的偏差受到的约束要小得多。我们讨论了Higgs衰变、电子对撞机上的共振Higgs产生、Higgs介导的B -> e^+ e^-衰变和电子的反常磁矩的限制。目前,最强的限制来自LHC上的h -> e^+ e^-,将耦合限制在SM Yukawa耦合的约600倍以下。未来的EDM测量以及下一代高光度e^+ e^-对撞机的共振希格斯粒子产生都有望带来重大改进。

英文摘要:

In the standard model (SM), the coupling of the Higgs boson to electrons is real and very small, proportional to the electron mass. New physics could significantly modify both real and imaginary parts of this coupling. We discuss experiments which are sensitive to the Higgs-electron coupling and derive the current bounds on new physics contributing to this coupling. The strongest constraint follows from the ACME bound on the electron electric dipole moment (EDM). We calculate the full analytic two-loop result for the electron EDM and show that it bounds the imaginary part of the Higgs-electron coupling to be less than 1.7 x 10^-2 times the SM electron Yukawa coupling. Deviations of the real part are much less constrained. We discuss bounds from Higgs decays, resonant Higgs production at electron colliders, Higgs mediated B -> e^+ e^- decays, and the anomalous magnetic moment of the electron. Currently, the strongest constraint comes from h -> e^+ e^- at the LHC, bounding the coupling to be less than ~600 times the SM Yukawa coupling. Important improvements can be expected from future EDM measurements as well as from resonant Higgs production at a next-generation high-luminosity e^+ e^- collider.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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