Determination of the Total Number of J/ψ from 4-Prong Data

FANG Shuang-Shi; CHEN Hai-Xuan; HENG Yue-Kun; HUANG Guang-Shun; JIN Shan; LU Gong-Ru; LU Hai-Jiang; PENG Hai-Ping; SHEN Xiao-Yan; ZHANG Jun-Mei; ZHU Yu-Can

Chinese Physics C> 2003, Vol. 27> Issue(4) : 277-281

Determination of the Total Number of J/ψ from 4-Prong Data

Institute of High Energy Physics, CAS, Beijing 100039, China2 Guangxi Normal University, Guilin 541002, China3 Henan Normal University, Xinxiang 453002, China4 University of Science and Technology of China, Hefei 230026, China

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Abstract：
Based on 4-prong events sample of J/ψ decay and the ψ′ data sample, a method is developed to determine J/ψ total number of two data sets which were taken from November 1999 to May 2001 at BESⅡ. The results are (27.00±1.48)×10⁶ and (30.70±1.62)×10⁶,respectively.

References

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. DING HuiLang et al.HEP NP ,1992,16(9):1(in Chinese)(丁慧良等.高能物理与核物理,1992,16(9):1)2. BAI JingZhi et al. Nucl. Instr. Meth.,2001,A458:6273. YU ZhongQiang et al.Determination of Total Number of the Fourthset J ψ. BES internal report, 1993(in Chinese)(郁忠强等.第四批J ψ总数的估算.BES内部资料,1993)4. MA Ai-Min.IHEP ,CAS ,Ph.D .Thesis,1995(in Chinese)(马爱民.博士论文,中国科学院高能物理研究所,1995)5. WANG ZhiYong et al.HEP NP ,2001,25(2):89(in Chinese)(王至勇等.高能物理与核物理,2001,25(2):89)6. HUANG GuangShun et al.HEP NP ,2001,25(9):889(in Chinese)(黄光顺等.高能物理与核物理,2001,25(9):889)7. FU HongYu.Measurement of The Trigger Efficiency for the New J ψ Data.The 9th BES Annual Meeting, Dalian, June,20008. Particle Data Group. Euor.Phys.Jour,2000,C :479. WANG Meng.IHEP ,CAS ,M .S .Thesis,1996(in Chinese)(王萌.硕士论文,中国科学院高能物理研究所,1996)

[1] HOU Ren-Chang , ZHAO Xuan . QUADRUPOLE-OCTUPOLE TWO-PHONON EXCITATIONS IN INELASTIC SCATTERING. Chinese Physics C, 1983, 7(2): 236-244.
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FANG Shuang-Shi, CHEN Hai-Xuan, HENG Yue-Kun, HUANG Guang-Shun, JIN Shan, LU Gong-Ru, LU Hai-Jiang, PENG Hai-Ping, SHEN Xiao-Yan, ZHANG Jun-Mei and ZHU Yu-Can. Determination of the Total Number of J/ψ from 4-Prong Data[J]. Chinese Physics C, 2003, 27(4): 277-281.

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Received: 2002-09-18
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

Determination of the Total Number of J/ψ from 4-Prong Data

Corresponding author: FANG Shuang-Shi,

Institute of High Energy Physics, CAS, Beijing 100039, China2 Guangxi Normal University, Guilin 541002, China3 Henan Normal University, Xinxiang 453002, China4 University of Science and Technology of China, Hefei 230026, China

Received Date: 2002-09-18
Accepted Date: 1900-01-01
Available Online: 2003-04-05

Abstract: Based on 4-prong events sample of J/ψ decay and the ψ′ data sample, a method is developed to determine J/ψ total number of two data sets which were taken from November 1999 to May 2001 at BESⅡ. The results are (27.00±1.48)×10⁶ and (30.70±1.62)×10⁶,respectively.