A photon conversion finder at BESⅢ

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XU Zhi-Rui and HE Kang-Lin. A photon conversion finder at BESⅢ[J]. Chinese Physics C, 2012, 36(8): 742-749. doi: 10.1088/1674-1137/36/8/010
XU Zhi-Rui and HE Kang-Lin. A photon conversion finder at BESⅢ[J]. Chinese Physics C, 2012, 36(8): 742-749.  doi: 10.1088/1674-1137/36/8/010 shu
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Received: 2011-11-01
Revised: 2011-12-12
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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A photon conversion finder at BESⅢ

Abstract: A photon conversion finder (PCF) based on track information from the main drift chamber (MDC) of the Beijing Spectrometer (BES0) at the Beijing Electron Positron Collider (BEPC/) is developed. The validation of the PCF is done by reconstructing π0 and measuring the branching fraction of J/ψ →γη'. Using the developed PCF tool, we mapped the materials from the interaction point through the BEPCII beam pipe up to the inner wall of the MDC.

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