标题： 从非定态希格斯的电弱手征拉格朗日量中获得的异常耦合对于$gg\to Z_L Z_L$ 显示英文标题

标题： Anomalous Couplings from the Electroweak Chiral Lagrangian for Off-Shell Higgs in $gg\to Z_L Z_L$

摘要： 我们研究在胶子融合过程中（纵向）$Z$-玻色子对的产生，作为异常希格斯耦合的探针。 特别感兴趣的是大质心能量的运动学区域，在该区域中希格斯玻色子高度离壳。 我们采用带有轻希格斯的电弱手征拉格朗日量，这是该过程最自然的有效场理论（EFT）。 我们通过详细分析振幅中领先和次领先的EFT贡献，在QCD的领先阶下，强调了作用量计数在系统应用EFT中的作用。 我们表明，在领先阶下，新物理贡献仅由两个参数描述，这两个参数依赖于三个EFT耦合。 在EFT的有效范围内，次领先的效应可以预期是较小的。 简要讨论了现象学含义。 显示英文摘要

摘要： We investigate the production of (longitudinal) $Z$-boson pairs in gluon fusion as a probe of anomalous Higgs couplings. Of particular interest is the kinematic region of large center-of-mass energy, where the Higgs-boson is highly off-shell. We employ the electroweak chiral Lagrangian with a light Higgs, which is the most natural effective field theory (EFT) for this process. We demonstrate this by a detailed analysis of the leading and next-to-leading EFT contributions to the amplitude, at leading order in QCD, emphasizing the role of power counting for a systematic application of the EFT. We show that at leading order the new-physics contributions are described by only two parameters, which depend on three EFT couplings. Subleading effects can be expected to be small within the range of validity of the EFT. Phenomenological implications are briefly discussed.