New Insights into Neutral Triple Gauge Couplings and Their Implications for High-Energy Physics

Recent research has explored the ultraviolet (UV) completion of neutral triple gauge couplings (nTGCs), which are significant in understanding physics beyond the Standard Model (SM). The study, titled "UV Completion of Neutral Triple Gauge Couplings" and authored by John Ellis, Hong-Jian He, Rui-Qing Xiao, Shi-Ping Zeng, and Jiaming Zheng, was submitted to arXiv on August 22, 2024.

The authors investigate nTGCs, which arise from dimension-8 operators in the SM Effective Field Theory (SMEFT). Their work focuses on a renormalizable model that incorporates vector-like heavy fermions. By computing one-loop contributions from these heavy fermions to the nTGC vertices, the researchers establish a connection to dimension-8 operators in the low-energy limit.

The findings indicate that the contributions from heavy fermion loops can generate effective operators that include two SM Higgs-doublet fields. The study presents results in terms of SMEFT coefficients and nTGC vertices, which involve two on-shell gauge bosons. Notably, in scenarios where heavy and light fermions mix, additional logarithmic corrections appear that are not accounted for in traditional parametrizations of form factors.

The implications of this research extend to high-energy collider experiments, where probing such UV dynamics through nTGCs could provide insights into new physics. The full paper can be accessed at arXiv:2408.12508.