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Higgs boson self-coupling constraints from single Higgs, double Higgs and electroweak measurements
Physics Letters B ( IF 4.3 ) Pub Date : 2021-04-22 , DOI: 10.1016/j.physletb.2021.136307
Giuseppe Degrassi , Biagio Di Micco , Pier Paolo Giardino , Eleonora Rossi

We set constraints on the trilinear Higgs boson self-coupling, λ3, by combining the information coming from the W mass and leptonic effective Weinberg angle, electroweak precision observables, with the single Higgs boson analyses targeting the γγ,ZZ,WW,τ+τ and b¯b decay channels and the double Higgs boson analyses in the bb¯bb¯,bb¯τ+τ and bb¯γγ decay channels, performed by the ATLAS collaboration. With the assumption that the new physics affects only the Higgs potential, values outside the interval 1.8λ3SM<λ3<9.2λ3SM are excluded at 95% confidence level. With respect to similar analyses that do not include the information coming from the electroweak precision observables our analysis shows a stronger constraint on both positive and negative values of λ3.



中文翻译:

单个希格斯,双重希格斯和电弱测量的希格斯玻色子自耦合约束

我们对三线性希格斯玻色子自耦合设定了约束, λ3,通过将来自W质量和轻子有效Weinberg角的信息相结合,可以观察到电弱的精确观测值,并针对单个的希格斯玻色子分析γγžžw ^w ^τ+τ-b¯b 衰变通道和双重希格斯玻色子分析 bb¯bb¯bb¯τ+τ-bb¯γγ衰减通道,由ATLAS合作完成。假设新物理学仅影响希格斯势,则区间外的值-1.8λ3SM<λ3<9.2λ3SM被排除在95%置信水平。对于不包括来自电弱精度可观察到的信息的类似分析,我们的分析显示出对正值和负值的更强约束λ3

更新日期:2021-04-27
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