Regular Article - Experimental Physics
Physics potential for the H decay at the CEPC
Institute of High Energy Physics, Chinese Academy of Science, 100049, Beijing, China
2 Department of Modern Physics, University of Science and Technology of China, 230026, Hefei, China
3 University of Chinese Academy of Sciences, 100049, Beijing, China
4 Department of Physics, University of Washington, 98195-1560, Seattle, USA
Accepted: 13 September 2021
Published online: 6 October 2021
The precision of the yield measurement of the Higgs boson decaying into a pair of Z bosons process at the Circular Electron Positron Collider is evaluated. Including the recoil Z boson associated with the Higgs production (Higgsstrahlung) a total of 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 statistical precision of BR() is estimated to be 6.9% using a multivariate analysis technique, based on boosted decision trees. The relative precision of the Higgs boson width, using this decay topology, is estimated by combining the obtained result with the precision of the inclusive ZH cross section measurement.
© The Author(s) 2021
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