We present one-loop formulas for contributing to the HZZ vertex in 't Hooft-Veltman gauge within Standard Model framework. One-loop off-shell Higgs decay rates to Z-pair are investigated in both unpolarized and longitudinal polarization for Z bosons in final state. The corrections are range of 7% to 8.4% when we vary the off-shell Higgs mass from 200 GeV to 500 GeV. In applications, we study off-shell Higgs decay H∗→ZZ in the Higgs productions at future colliders such as the signal processes γ∗(Q2)γ→H∗→ZZ and e−γ→e−H∗→e−ZZ are analyzed.
@article{arxiv.2209.12410,
title = {One-loop off-shell decay $H^* \rightarrow ZZ$ at future colliders},
author = {Khiem Hong Phan and Dzung Tri Tran and Anh Thu Nguyen},
journal= {arXiv preprint arXiv:2209.12410},
year = {2023}
}