The precision of the yield measurement of the Higgs boson decaying into a pair of Z bosons process at the Circular Electron Positron Collider (CEPC) is evaluated. Including the recoil Z boson associated with the Higgs production (Higgsstrahlung) total three Z bosons are involved for this channel, from which final states characterized by the presence of a pair of leptons, quarks, and neutrinos are chosen for the signal. Two analysis approaches are compared and the final precision of σZH⋅BR(H→ZZ∗) is estimated to be 7.9% using a multivariate analysis technique, based on boosted decision trees. The relative precision of the Higgs boson width, using this H→ZZ∗ decay topology, is estimated by combining the obtained result with the precision of the inclusive \textit{ZH} cross section measurement.
@article{arxiv.2103.09633,
title = {Physics potential for the H$\rightarrow$ZZ$^{*}$ decay at the CEPC},
author = {Ryuta Kiuchi and Yanxi Gu and Min Zhong and Lingteng Kong and Alex Schuy and Shih-Chieh Hsu and Xin Shi and Kaili Zhang},
journal= {arXiv preprint arXiv:2103.09633},
year = {2021}
}