Efficiency Correction in the Measurement of ψ′→pp Angular Distribution

JIAO Jian-Bin; ZHU Yong-Sheng; ZHANG Xue-Yao

Chinese Physics C> 2006, Vol. 30> Issue(10) : 931-935

Efficiency Correction in the Measurement of ψ′→pp Angular Distribution

Shandong University, Ji'nan 250100, China2 Institute of High Energy Physics, CAS, Beijing 100049, China

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Abstract：
In the angular distribution measurement of ψ′→pp, the sample of J/ψ→pp selected from 58M J/ψ events with high statistics is used to determine the polar angle dependent efficiency, and to correct the Monte Carlo efficiency in ψ′→pp. The systematic error of this method is also analyzed. The obtained efficiencies and related errors are used for the measurement of angular distribution of ψ′→pp.

References

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JIAO Jian-Bin, ZHU Yong-Sheng and ZHANG Xue-Yao. Efficiency Correction in the Measurement of ψ′→pp Angular Distribution[J]. Chinese Physics C, 2006, 30(10): 931-935.

JIAO Jian-Bin, ZHU Yong-Sheng and ZHANG Xue-Yao. Efficiency Correction in the Measurement of ψ′→pp Angular Distribution[J]. Chinese Physics C, 2006, 30(10): 931-935. shu

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Received: 2006-03-07
Revised: 2006-03-27

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沈阳化工大学材料科学与工程学院沈阳 110142

Efficiency Correction in the Measurement of ψ′→pp Angular Distribution

Corresponding author: JIAO Jian-Bin,

Shandong University, Ji'nan 250100, China2 Institute of High Energy Physics, CAS, Beijing 100049, China

Received Date: 2006-03-07
Accepted Date: 2006-03-27
Available Online: 2006-10-05

Abstract: In the angular distribution measurement of ψ′→pp, the sample of J/ψ→pp selected from 58M J/ψ events with high statistics is used to determine the polar angle dependent efficiency, and to correct the Monte Carlo efficiency in ψ′→pp. The systematic error of this method is also analyzed. The obtained efficiencies and related errors are used for the measurement of angular distribution of ψ′→pp.