A Kinematic Fit Method for All-Photon Events

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DU Shu-Xian and YUAN Chang-Zheng. A Kinematic Fit Method for All-Photon Events[J]. Chinese Physics C, 2006, 30(7): 670-674.
DU Shu-Xian and YUAN Chang-Zheng. A Kinematic Fit Method for All-Photon Events[J]. Chinese Physics C, 2006, 30(7): 670-674. shu
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Received: 2006-01-17
Revised: 2006-02-17
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A Kinematic Fit Method for All-Photon Events

    Corresponding author: YUAN Chang-Zheng,
  • Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Abstract: An improved kinematic fit method is developed for analyzing all-photon events, where the interaction point is unknown. The fitting algorithm is checked with Monte Carlo samples to ensure that the fitting program works properly. This is applied to the Monte Carlo simulated ψ(2S) decays. A higher efficiency is achieved. This method can be generally applied to analyzing all-photon events at electron-positron collider.

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