Measurement of H→μ+ μ- production in association with a Z boson at the CEPC

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Zhen-Wei Cui, Qiang Li, Gang Li, Man-Qi Ruan, Lei Wang and Da-Neng Yang. Measurement of H→μ+ μ- production in association with a Z boson at the CEPC[J]. Chinese Physics C, 2018, 42(5): 053001. doi: 10.1088/1674-1137/42/5/053001
Zhen-Wei Cui, Qiang Li, Gang Li, Man-Qi Ruan, Lei Wang and Da-Neng Yang. Measurement of H→μ+ μ- production in association with a Z boson at the CEPC[J]. Chinese Physics C, 2018, 42(5): 053001.  doi: 10.1088/1674-1137/42/5/053001 shu
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Received: 2017-11-29
Revised: 2018-02-12
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    Supported by National Natural Science Foundation of China (11475190, 11575005), CAS Center for Excellence in Particle Physics (CCEPP) and CAS Hundred Talent Program (Y3515540U1)

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Measurement of H→μ+ μ- production in association with a Z boson at the CEPC

    Corresponding author: Zhen-Wei Cui,
    Corresponding author: Qiang Li,
  • 1.  Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • 2. Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • 3. CAS Center for Excellence in Particle Physics, Beijing 100049, China
  • 4. CAS Center for Excellence in Particle Physics, Beijing 100049, China
  • 5. Institute of High Energy Physics, Beijing 100049, China
Fund Project:  Supported by National Natural Science Foundation of China (11475190, 11575005), CAS Center for Excellence in Particle Physics (CCEPP) and CAS Hundred Talent Program (Y3515540U1)

Abstract: 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.

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