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arXiv 1708.09079hep-ph
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$e^+e^-$对撞机上三重Higgs耦合的模型无关确定

Model-Independent Determination of the Triple Higgs Coupling at $e^+e^-$ Colliders

Tim Barklow, Keisuke Fujii, Sunghoon Jung, Michael E. Peskin, Junping Tian

摘要:

在高能对撞机上观察到的希格斯对的产生可以为三重希格斯耦合的存在提供证据。然而,实际确定这种耦合的值是比较困难的。在新物理学的一般模型中,双希格斯粒子的产生过程可以从许多可能的超标准模型效应中得到贡献。如果要对希格斯场势与标准模型的偏差做出明确的说明,就必须理解这种依赖性。本文研究了从过程$e^+e^-\to Zhh$中提取三重Higgs耦合。我们表明,通过结合测量这个过程与其他测量可在500 GeV的$e^+e^-$对撞机,它是可能的引用模型无关的限制的有效场论参数C6参数化修改的希格斯势。我们提出了精确的误差估计的基础上预期的ILC物理程序,研究与充分的模拟。我们的分析也提供了新的见解模型无关提取的希格斯玻色子耦合常数和总宽度从$e^+e^-$数据。

英文摘要:

The observation of Higgs pair production at high-energy colliders can give evidence for the presence of a triple Higgs coupling. However, the actual determination of the value of this coupling is more difficult. In the context of general models for new physics, double Higgs production processes can receive contributions from many possible beyond-Standard-Model effects. This dependence must be understood if one is to make a definite statement about the deviation of the Higgs field potential from the Standard Model. In this paper, we study the extraction of the triple Higgs coupling from the process $e^+e^-\to Zhh$. We show that, by combining the measurement of this process with other measurements available at a 500 GeV $e^+e^-$ collider, it is possible to quote model-independent limits on the Effective Field Theory parameter c6 that parametrizes modifications of the Higgs potential. We present precise error estimates based on the anticipated ILC physics program, studied with full simulation. Our analysis also gives new insight into the model-independent extraction of the Higgs boson coupling constants and total width from $e^+e^-$ data.

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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