We derive the dimension-8 standard-model effective theory (SMEFT) contact terms relevant for vector-pair production at the LHC and lepton colliders. We first list the relevant dimension-8 massless SMEFT amplitudes, and then obtain the low-energy amplitudes using on-shell Higgsing. In all cases, the contributions we calculate are the leading-order contributions to 4-point contact-terms; the dimension-6 SMEFT merely corrects the three-point couplings entering the amplitudes. Since they are given in terms of physical quantities, namely momenta and polarizations, the results allow for a direct mapping of EFT effects to low-energy observables. The vector amplitudes are sensitive to both anomalous vector couplings and Higgs self-couplings. The left-handed fermion amplitudes feature SU(2) violating effects first generated at dimension-8. We also compare our results to HEFT predictions. Interestingly, the dimension-8 SMEFT populates almost all the novel structures generated by the dimension-8 HEFT.
Massless-Massive Amplitude Correspondence I: Helicity-chirality Matching and On-shell Higgsing
Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；Hangzhou Institute for Advanced Study, UCAS（中国科学院大学杭州高等研究院）；International Center for Theoretical Physics Asia-Pacific（亚太理论物理中心）；Chinese University of Hong Kong, Shenzhen（香港中文大学（深圳））
On-Shell Renormalization of Dim-8 SMEFT from Complete Amplitude Basis: I. Four-Fermion Operators
School of Science, Sun Yat-sen University（中山大学理学院）；Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, UCAS（杭州高等研究院基础物理与数学学院，中国科学技术大学）；International Centre for Theoretical Physics Asia-Pacific（亚太理论物理中心）；School of Physics, Korea Institute for Advanced Study (KIAS)（韩国高等科学研究院物理学院）
Anomalous Dimension of a General Effective Gauge Theory I: Bosonic Sector
CERN（欧洲核子研究中心）；Dipartimento di Fisica e Astronomia “G. Galilei”, Università degli Studi di Padova（帕多瓦大学物理与天文学系）；Istituto Nazionale di Fisica Nucleare, Sezione di Padova（意大利国家核物理研究所帕多瓦分部）
Neural simulation-based inference of the Higgs trilinear self-coupling via off-shell Higgs production
University of California, Irvine（加州大学尔湾分校）；Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）；Georgia Institute of Technology（佐治亚理工学院）；Max Planck Institute for Physics（马克斯·普朗克物理研究所）
Off-shell Higgs production at the LHC as a probe of the trilinear Higgs coupling
在标准模型有效场论（SMEFT）的背景下，我们研究的三线性希格斯耦合的约束，源于离壳层希格斯生产质子-质子碰撞。我们对$gg \to h^\ast \to Z Z \to 4 \ell$过程的计算包括对胶子-胶子-聚变Higgs产生的双圈修正和对Higgs传播子及其衰变的单圈修正。采用矩阵元素为基础的运动学判别，我们确定了LHC运行3的范围和LHC的高亮度选项，在约束相关的SMEFT威尔逊系数。我们提出的限制，不仅是竞争，但也补充预计间接限制，人们期望获得的包容性测量的单希格斯生产过程中，在未来的大型强子对撞机运行。
One-loop corrections to $h\to b\bar b$ and $h\to τ\bar τ$ decays in the Standard Model Dimension-6 EFT: four-fermion operators and the large-$m_t$ limit
Precise predictions for double Higgs production in association with a vector boson in Effective Field Theory
Università di Padova（帕多瓦大学）；Istituto Nazionale di Fisica Nucleare, Sezione di Padova（意大利国家核物理研究所帕多瓦分部）；Scuola Galileiana di Studi Superiori, Università degli Studi di Padova（帕多瓦大学伽利略高等研究学院）
