Interference effects on Higgs mass measurement in $e^+e^-\to H(\gamma\gamma) Z$ at CEPC

Authors :: Xu, Guang-Zhi
Li, Gang
Li, Yi-Jie
Liu, Kui-Yong
Zhang, Yu-Jie
Source :: Chinese Physics C Vol. 40, No. 3 (2016) 033101
Publication Year :: 2015
Abstract: A high luminosity Circular Electron Positron Collider (CEPC) as a Higgs Factory will be helpful to the precision measurement of the Higgs mass. The signal-background interference effect is carefully studied for the Higgs diphoton decay mode in the associated Z boson production at the future $e^+e^-$ colliders at energy $246 {\rm GeV}$. The mass shifts go up from about $20 {\rm MeV}$ to $50 {\rm MeV}$ for the experimental mass resolution ranging from $0.8 {\rm GeV}$ to $2 {\rm GeV}$.<br />Comment: Comments and suggestions are welcome

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