Chinese Physics C > 2016, Vol. 40 > Issue(3): 033101 DOI: 10.1088/1674-1137/40/3/033101

Interference effects on Higgs mass measurement in e⁺e^-→H(γγ)Z at CEPC

1.
Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education) andSchool of Physics, Beihang University, Beijing 100191, China
2.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3.
Department of Physics, Liaoning University, Shenyang 110036, China
4.
Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education) andSchool of Physics, Beihang University, Beijing 100191, China
5.
CAS Center for Excellence in Particle Physics, Beijing 100049, China

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Abstract：
A high luminosity Circular Electron Positron Collider (CEPC) as a Higgs Factory will be helpful for precision measurements of the Higgs mass. The signal-background interference effect is carefully studied for the Higgs diphoton decay mode in associated Z boson production at future e ⁺e ^-colliders at energy 246 GeV. The mass shifts go up from about 20 MeV to 50 MeV for the experimental mass resolution ranging from 0.8 GeV to 2 GeV.
- keyword,
- interference effect,
- Higgs mass,
- Higgs factories

References

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Guang-Zhi Xu, Gang Li, Yi-Jie Li, Kui-Yong Liu and Yu-Jie Zhang. Interference effects on Higgs mass measurement in e ⁺e ^-→H( γγ)Z at CEPC[J]. Chinese Physics C, 2016, 40(3): 033101. doi: 10.1088/1674-1137/40/3/033101

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Received: 2015-05-25
Revised: 2015-10-26

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Supported by National Natural Science Foundation of China (11375021, 11447018), New Century Excellent Talents in University (NCET) (NCET-13-0030), Major State Basic Research Development Program of China (2015CB856701), Fundamental Research Funds for Central Universities, and Education Ministry of LiaoNing Province.

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Interference effects on Higgs mass measurement in e⁺e^-→H(γγ)Z at CEPC

Corresponding author:Guang-Zhi Xu,

1. Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education) andSchool of Physics, Beihang University, Beijing 100191, China
2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3. Department of Physics, Liaoning University, Shenyang 110036, China
4. Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education) andSchool of Physics, Beihang University, Beijing 100191, China
5. CAS Center for Excellence in Particle Physics, Beijing 100049, China

Received Date:2015-05-25
Accepted Date:2015-10-26
Available Online:2016-02-29

Fund Project:Supported by National Natural Science Foundation of China (11375021, 11447018), New Century Excellent Talents in University (NCET) (NCET-13-0030), Major State Basic Research Development Program of China (2015CB856701), Fundamental Research Funds for Central Universities, and Education Ministry of LiaoNing Province.

Abstract:A high luminosity Circular Electron Positron Collider (CEPC) as a Higgs Factory will be helpful for precision measurements of the Higgs mass. The signal-background interference effect is carefully studied for the Higgs diphoton decay mode in associated Z boson production at future e⁺e^-colliders at energy 246 GeV. The mass shifts go up from about 20 MeV to 50 MeV for the experimental mass resolution ranging from 0.8 GeV to 2 GeV.