A Kinematic Fit Method for All-Photon Events

DU Shu-Xian; YUAN Chang-Zheng

Chinese Physics C> 2006, Vol. 30> Issue(7) : 670-674

A Kinematic Fit Method for All-Photon Events

DU Shu-Xian ,
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
HTML
Reference
Related

PDF

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.

References

[1]

. ZHENG Zhi-Peng, ZHU Yong-Sheng et al. Electron-Positron Physics at BES. Nanning: Guangxi Science Technology Publishing House, 1998(in Chinese)(郑志鹏，朱永生等.北京谱仪正负电子物理.南宁:广西科学技术出版社，1998)2. BAI Jing-Zhi et al. Nucl. Instr. Meth., 1994, A344: 319-334; BAI Jing-Zhi et al. Nucl. Instr. Meth., 2001, A458:627-6373. DU Shu-Xian, YUAN Chang-Zheng, LIU Jue-Ping et al.HEP NP, 2003, 27(6): 521-525(in Chinese)(杜书先，苑长征，刘觉平等.高能物理与核物理，2003, 27(6):521-525)4. ZHU Yong-Sheng. Probability and Statistics in Experiment Physics. Beijing: Science Press, 1991(in Chinese)(朱永生.实验物理中的概率和统计.北京:科学出版社，1991)5. Frodesen A G, Skjeggestad O, T#934;fte H. Probability and Statistics in Particle Physics. New York: Columbia University Press, 1979

[1]	HU Hai-Ming , WENG Yao , GUO Yi-Qing , JIN Yi , ZHANG Bing-Xin , HU Jun-Hui , GAO Yuan-Ning . Improvement on Hadronic Event Selection in R Measurement. Chinese Physics C, 2007, 31(9): 802-809.
[2]	LIU Xi-Ming , SUN Xu-Bin . Strangeness Suppression in e⁺e^－ Light Flavour Jets. Chinese Physics C, 2007, 31(2): 138-142.
[3]	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 . Determination of the Total Number of J/ψ from 4-Prong Data. Chinese Physics C, 2003, 27(4): 277-281.
[4]	HUANG Xing-Tao , MA Lian-Liang , WANG Kong-Sen , ZHANG Xue-Yao , HE Mao , ZHANG Nai-Jian . Kinematic Fit Program Design with Least-Square Method. Chinese Physics C, 2003, 27(9): 813-818.
[5]	WANG Shao-Shun , WU Chong . Analysis of the Fluctuations in the Event-Space for NA27 Data. Chinese Physics C, 2002, 26(3): 216-221.
[6]	LIU Xi-Ming , ZHANG Xue-Yao , WANG Hai-Long , WANG Yu-Shui . Fragmentation Character of Resonance Events in BEPC e⁺e^－ Annihilation. Chinese Physics C, 2002, 26(6): 557-562.
[7]	REN JingRu , LU SuiLing , ZHOU SuiJian . Phenomenon of Energy Concentration in High Energy Families. Chinese Physics C, 2000, 24(1): 1-3.
[8]	XUE Liang , DAI ZhiQiang , LI Jinyu , ZHANG Xueyao , FENG CunFeng , FU Yu , ZHANG NaiJian , REN JingRu , LU SuiLing . Phenomenon of Alignment in Cosmic Ray High Energy Family Events. Chinese Physics C, 2000, 24(11): 979-984.
[9]	Qi Xiangrong , Chen Jiangchuan , Hu Haiming , Hu Tao , Huang Guangshun , Ju Xin , Li Jin , Li Xinhua , Mao Zepu , Xue Shengtian , Zhao Zhengguo , Zheng Zhipeng , Zhou Li . Study and Simulation of the Features of Hadronic Events in the BEPC Energy Region. Chinese Physics C, 1999, 23(1): 1-9.
[10]	Ren Jingru , Lu Suiling , Wang Chengrui , He Mao , Zhang Naijian , Cao Peiyuan , Li Jinyu . Halo Events in Superhigh Energy Nuclear Interactions. Chinese Physics C, 1996, 20(5): 400-404.
[11]	Jiang Zhijin , Wang Taijie , Huang Tao . Primary Vertex Fitting in BES. Chinese Physics C, 1995, 19(1): 1-7.
[12]	FAN Xiao-Ling , REN Jing-Ru , LU Sui-Ling , SU Shi , WANG Cheng-Rui , HE Mao , CAO Pei-Yuan , LI Jin-Yu . Analyses of Multi-Core Family Events. Chinese Physics C, 1993, 17(6): 486-493.
[13]	REN Jing-Ru , LU Sui-Ling , SU Shi , HUO An-Xiang , WANG Cheng-Rui , ZHANG Nai-Jian , HE Mao , CAO Pei-Yuan , LI Jin-Yu , WANG Shi-Zhi , LI Guang-Ju , BAI Guang-Zhi , LIU Zhong-He , , . STUDY ON SUPERHIGH ENERGY γ-RAY FAMILY EVENTS WITH LARGE-SCALE Fe EMULSION CHAMBERS. Chinese Physics C, 1990, 14(11): 961-965.
[14]	REN Jing-Ru , KUANG Hao-Huai , HUO An-Xiang , LU Sui-Ling , SU Shi , WANG Run-Xin , WANG Cheng-Rui , ZHANG Nai-Jian , CAO Pei-Yuan , LI Jin-Yu , ZOU Bao-Tang , WANG Shi-Zhi , LI Gu , , , . A SUPER HIGH ENERGY GAMMA-RAY FAMILY EVENT IN THE FORM OF TWO CONCENTRIC RINGS. Chinese Physics C, 1989, 13(3): 193-198.
[15]	HE Yu-Dong , ZHU Qing-Qi , HUO An-Xiang . INTERPRETATION OF AZIMUTHAL ANISOTROPICAL GAMMA-FAMILY EVENTS. Chinese Physics C, 1989, 13(5): 476-480.
[16]	REN Jing-Ru , HUO An-Xiang , LU Sui-Ling , SU Shi , WANG Cheng-Rui , ZHANG Nai-Jian , CAO Pei-Yuan , LI Jin-Yu , ZOU Bao-Tang , WANG Shi-Zhi , GENG Qing-Xi , BAI Guang-Zhi , MU Jun , . GAMMA FAMILY EVENTS WITH LARGE-SEPARATION DOUBLE CORES. Chinese Physics C, 1989, 13(2): 97-102.
[17]	JING Gui-Ru , DING Lin-Kai , ZHU Qing-Qi , JING Cai-Liu . RING-LIKE EVENT OBSERVED IN SUPERHIGH ENERGY INTERACTION AND PHASE TRANSITION. Chinese Physics C, 1987, 11(5): 603-608.
[18]	DONG Bao-Zhong . ANALYSIS OF HADRONIC EVENTS. Chinese Physics C, 1987, 11(5): 596-602.
[19]	ZOU Bao-Tang , WANG Cheng-Rui , REN Jing-Ru . A COSMIC RAY SUPER HIGH ENERGY MULTIJET FAMILY EVENT. Chinese Physics C, 1986, 10(4): 393-399.
[20]	REN Jing-Ru , LU Sui-Ling , KUANG Hao-Huai , SU Shi , WANG Yun-Xin , WANG Dian-Chen , WANG Cheng-Rui , CAO Pei-Yuan , LI Jin-Yu , LI Guang-Ji , BAI Guang-Zhi . AN EVENT WITH TWO NON-SYMMETRICAL CORES. Chinese Physics C, 1984, 8(3): 257-260.

Access

Get Citation

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

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2006-01-17
Revised: 2006-02-17

Article Metric

Article Views(3456)
PDF Downloads(617)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2006-01-17

Accepted Date: 2006-02-17

Available Online: 2006-07-05

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.

HTML

Reference (1)

A Kinematic Fit Method for All-Photon Events

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article