Study of Photon Detection Efficiency at BESⅡ

LI Shu-Min; YUAN Chang-Zheng; HE Kang-Lin; FANG Shuang-Shi; WANG Wen-Feng; LU Feng; SHEN Xiao-Yan

Chinese Physics C> 2004, Vol. 28> Issue(8) : 859-865

Study of Photon Detection Efficiency at BESⅡ

Institute of High Energy Physics,CAS,Beijing 100039,China2 China Center of Advanced Science and Technology,Beijing 100080,China

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Abstract：
The photon detection efficiencies of Monte Carlo simulation and data are studied using three methods in the decay of J/ψ→ρπ at BESⅡ.The results show that the Monte Carlo can simulate the photon detection efficiency of data in the precision of 1%-3%.The source of discrepancy between Monte Carlo and data is also studied in this work.The sample of e+e-→γe+e- at the center of mass energy of s =3.770GeV is used to study the detection efficiencies of the photons with the energies greater than 1.4 GeV for Monte Carlo and data that are both 100%,and the difference of the photon detection efficiency between Monte Carlo and data is less than 1%.

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LI Shu-Min, YUAN Chang-Zheng, HE Kang-Lin, FANG Shuang-Shi, WANG Wen-Feng, LU Feng and SHEN Xiao-Yan. Study of Photon Detection Efficiency at BESⅡ[J]. Chinese Physics C, 2004, 28(8): 859-865.

LI Shu-Min, YUAN Chang-Zheng, HE Kang-Lin, FANG Shuang-Shi, WANG Wen-Feng, LU Feng and SHEN Xiao-Yan. Study of Photon Detection Efficiency at BESⅡ[J]. Chinese Physics C, 2004, 28(8): 859-865. shu

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Received: 2003-11-25
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of Photon Detection Efficiency at BESⅡ

Corresponding author: LI Shu-Min,

Institute of High Energy Physics,CAS,Beijing 100039,China2 China Center of Advanced Science and Technology,Beijing 100080,China

Received Date: 2003-11-25

Accepted Date: 1900-01-01

Available Online: 2004-08-05

Abstract: The photon detection efficiencies of Monte Carlo simulation and data are studied using three methods in the decay of J/ψ→ρπ at BESⅡ.The results show that the Monte Carlo can simulate the photon detection efficiency of data in the precision of 1%-3%.The source of discrepancy between Monte Carlo and data is also studied in this work.The sample of e+e-→γe+e- at the center of mass energy of s =3.770GeV is used to study the detection efficiencies of the photons with the energies greater than 1.4 GeV for Monte Carlo and data that are both 100%,and the difference of the photon detection efficiency between Monte Carlo and data is less than 1%.

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Study of Photon Detection Efficiency at BESⅡ

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