Measurement of H → μ+ μ− production in association with a Z boson at the CEPCSupported by National Natural Science Foundation of China (11475190, 11575005), CAS Center for Excellence in Particle Physics (CCEPP) and CAS Hundred Talent Program (Y3515540U1)
Zhen-Wei Cui (Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China); Qiang Li (Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China, CAS Center for Excellence in Particle Physics, Beijing 100049, China); Gang Li (Institute of High Energy Physics, Beijing 100049, China, CAS Center for Excellence in Particle Physics, Beijing 100049, China); Man-Qi Ruan (Institute of High Energy Physics, Beijing 100049, China, CAS Center for Excellence in Particle Physics, Beijing 100049, China); Lei Wang (Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China); et al - Show all 6 authors
The Circular Electron-Positron Collider (CEPC) is a future Higgs factory proposed by the Chinese high energy physics community. It is planned to operate at a center-of-mass energy of 240–250 GeV and is expected to accumulate an integrated luminosity of 5 ab−1 over ten years of operation. At the CEPC, Higgs bosons will be dominantly produced from the ZH associated process. The vast number of Higgs events collected will enable precise studies of its properties, including Yukawa couplings to massive particles. With GEANT4-based simulation of detector effects, we study the feasibility of measuring the Higgs boson decaying into a pair of muons at the CEPC. The results with and without information from the Z boson decay products are provided, showing that a signal significance of over 10 standard deviations can be achieved and the H-μ-μ coupling can be measured within 10% accuracy.
