Chinese Physics C > 2010, Vol. 34 > Issue(6): 831-835 DOI: 10.1088/1674-1137/34/6/035

Measurement of J/ψ→η_cγ at KEDR

et al

Abstract
HTML
Reference
Related

PDF

Abstract：

We present a study of the inclusive photon spectra from 5.9 million J/ψ decays collected with the KEDR detector at the VEPP-4M e⁺e^－collider. We measure the branching fraction of radiative decay J/ψ→η_cγ, η_cwidth and mass. Our preliminary results are:M(η_c)=2979.4±1.5±1.9 MeV/c²,Γ(η_c) = 27.8±5.1±3.3 MeV, B(J/ψ→η_cγ)=(2.34±0.15±0.40)%.

References

[1]

. Gaiser J et al. Phys. Rev. D, 1986, 34: 7112. Eichten E E et al. Rev. Mod. Phys., 2008, 80: 1161-11933. Beilin V A, Radyushkin A V. Sov. J. Nucl. Phys., 1987,45: 3424. Dudek J J et al. Phys. Rev. D, 2006, 73: 074505. Mitchell R E et al. Phys. Rev. Lett., 2009, 102: 0118016. Anashin V V et al. Nucl. Instr. and Meth. A, 2002, 478:4207. Anashin V et al. Stockholm 1998, EPAC 98*: 400. Preparedfor 6th European Particle Accelerator Conference (EPAC98), Stockholm, Sweden, 22-26 Jun 1998.8. Blinov V E et al. Nucl. Instr. and Meth. A, 2009, 598: 23

[1]	Qing Gao,Jing-Zhi Zhang,Chun-Hua Li,Jun-Hao Yin. Alignment and measurement of the magnetic field for the BESIII muon counter. Chinese Physics C, 2016, 40(11): 116001.doi:10.1088/1674-1137/40/11/116001
[2]	HUANG Wei-Ping,TANG Ze-Bo,LI Cheng,JIANG Kun,ZHAO Xiao-Kun,WANG Peng-Fei. An accurate measurement of PMT TTS based on the photoelectron spectrum. Chinese Physics C, 2015, 39(6): 066003.doi:10.1088/1674-1137/39/6/066003
[3]	ZHANG Fei-Hong,YU Bo-Xiang,HU Wei,YANG Ma-Sheng,CAO Guo-Fu,CAO Jun,ZHOU Li. Measurement of the liquid scintillator nonlinear energy response to electron. Chinese Physics C, 2015, 39(1): 016003.doi:10.1088/1674-1137/39/1/016003
[4]	FAN Huan-Huan,CAO Ping,LIU Shu-Bin,AN Qi. TOT measurement implemented in FPGA TDC. Chinese Physics C, 2015, 39(11): 116101.doi:10.1088/1674-1137/39/11/116101
[5]	CAI Xiao,FU Cheng-Dong,MO Xiao-Hu,QIN Qing,WANG Yi-Fang,ZHANG Jian-Yong. A scenario for high accuracy τ mass measurement at BEPC-Ⅱ. Chinese Physics C, 2012, 36(7): 573-577.doi:10.1088/1674-1137/36/7/001
[6]	M. Ablikim et al (BESⅡ collaboration). Measurement of J/ψ decays into ΛΛ π⁺π^-. Chinese Physics C, 2012, 36(11): 1031-1039.doi:10.1088/1674-1137/36/11/001
[7]	ZANG Yong-Dong,WU Jun-Xia,ZHAO Tie-Cheng,ZHANG Sheng-Hu,MAO Rui-Shi,XU Hu-Shan,SUN Zhi-Yu,MA Xin-Wen,TU Xiao-Lin,XIAO Guo-Qing. Simulation and measurement of the resonant Schottky pickup. Chinese Physics C, 2011, 35(12): 1124-1129.doi:10.1088/1674-1137/35/12/008
[8]	ZHANG Yuan,YU Cheng-Hui,JI Da-Heng,XU Gang,WEI Yuan-Yuan,QIN Qing. Measurement and correction of coupling in BEPCⅡ. Chinese Physics C, 2011, 35(12): 1143-1147.doi:10.1088/1674-1137/35/12/012
[9]	MO Xiao-Hu,CHU Yuan-Ping,DONG Hai-Yi,FU Cheng-Dong,LI Xiao-Nan,LIU Qian,QU Hua-Min,QIN Qing,SHEN Cheng-Ping,WANG Yi-Fang,XU Jin-Qiang,ZHANG Jian-Yong,ZHANG Qing-Jiang,ZHANG Yin-Hong,ZHANG Tian-Bao,ZHAO Zhuo. Beam energy measurement system at BEPCⅡ. Chinese Physics C, 2010, 34(6): 912-917.doi:10.1088/1674-1137/34/6/050
[10]	GUAN Yong-Jing,de Cesare,WANG Hui-Juan.²³⁶U AMS measurement at CIRCE. Chinese Physics C, 2010, 34(11): 1729-1732.doi:10.1088/1674-1137/34/11/012
[11]	on behalf,of CMD-,and SND. Measurement ofRat VEPP-2000. Chinese Physics C, 2010, 34(6): 669-674.doi:10.1088/1674-1137/34/6/010
[12]	V. M. Aulchenko,E. M. Baldin,A. K. Barladyan. Recent results from the KEDR detector. Chinese Physics C, 2010, 34(6): 650-655.doi:10.1088/1674-1137/34/6/007
[13]	A. G. Shamov (KEDR collaboration). Measurement of J/ψ leptonic width with the KEDR detector. Chinese Physics C, 2010, 34(6): 836-841.doi:10.1088/1674-1137/34/6/036
[14]	M. Sudol (for \=PANDA collaboration). Time-like proton form factor measurement with PANDA. Chinese Physics C, 2009, 33(12): 1244-1248.doi:10.1088/1674-1137/33/12/031
[15]	CHEN Guang-Ling,TIAN Shun-Qiang,JIANG Bo-Cheng,LIU Gui-Min. A GUI tool for beta function measurement using MATLAB. Chinese Physics C, 2009, 33(4): 297-300.doi:10.1088/1674-1137/33/4/012
[16]	TU Xiao-Lin,XU Hu-Shan,XIA Jia-Wen,WANG Meng,MAO Rui-Shi,YUAN You-Jin,HU Zheng-Guo,LIU Yong,ZHANG Hong-Bin,ZANG Yong-Dong,ZHAO Tie-Cheng,ZHANG Xue-Ying,FU Fen,YANG Jian-Cheng,MAO Li-Jun,XIAO Chen,XIAO Guo-Qing,ZHAO Hong-Wei,ZHAN Wen-Long. A pilot experiment for mass measurement at CSRe. Chinese Physics C, 2009, 33(7): 516-520.doi:10.1088/1674-1137/33/7/003
[17]	HUANG Wen-Xue,XIAO Guo-Qing,WANG Yue,TIAN Yu-Lin,ZHU Zhi-Chao,XU Hu-Shan,ZHAN Wen-Long. High precision mass measurement and LPT. Chinese Physics C, 2008, 32(S2): 197-200.
[18]	Bai Jingzhi,Bian Jianguo,Chai Zhengwei,Chen Guangpei,Chen Hongfang,Chen Jiangchuan,Chen Shaomin,Chen Yaqing,Chen Yu,Chen Yuanbo,Cheng Baosen,Cui Xiangzong,Ding Huiliang,Du Zhizhen,Fan Xiaoling,Fang Jian,Gao Cuishan,Gao Meili,Gao Shuqi,Gu Jianhui,Gu Shudi,Gu Weixin,Gu Yifan,Guo Yanan,Han Shiwen,Han Ying,He Jingtang,He Ju,He Mao,Hu Guiyun,Hu Jingliang,Hu Qionghui,Hu Tao,Hu Xiaoqing,Huang Xiuping,Huang Yinzhi,Jiang Chunhua,Jin Shan,Jin Yan,Kang Shuhui,Ke Zunjian,Lai Yuanfen,Lan Huibin,Lang Pengfei,Li Jin,Li Peiqin,Li Qun,Li Rubai,Li Wei,Li Weidong,Li Weiguo,Li Xinhua,Li Xiaonan,Lin Shuzi,Liu Huaimin,Liu Jing,Liu Jinghua,Liu Qi,Liu Rongguang,Liu Yan,Liu Zhenan,Lü Feng,Lü Junguang,Lu Jianye,Luo Shuanqun,Luo Yong,Ma Aimin,MaEncheng,Ma Jimao,Mao Huishun,Mao Zepu,Meng Xiangcheng,Ni Hulling,Nie Jing,Qi Nading,Qu Yunhe,Qiu Jinfa,Que Youkun,Rong Gang,Shao Yuying,Shen Benwei,Shen Dingli,Shen Hong,Shen Xiaoyan,Sheng Huayi,Shi Huanzhang,Song Xiaofei,Sun Fang,Sun Hansheng,Sun Shijun,Tan Yiping,Tang Suqiu,Tian Jianling,Tong Guoliang,Wang Feng,Wang Jufang,Wang Linzhou,Wang Lingshu,Wang Man,Wang Meng,Wang Peiliang,Wang Ping,Wang Shaomin,Wang Taijie,Wang Yunyong,Wei Chenglin,Wu Yougeng,Xi Deming,Xia Xiaomi,Xie Peipei,Xiong Weijun,Xu Guofa,Xu Rongsheng,Xu Zhijing,Xue Shengtian,Yan Jie,Yan Wuguang,Yang Changyou,Yang Chunmin,Yang Jie,Yang Xiaofeng,Ye Minghan,Ye Shizhang,Ye Shuwei,Yi Kai,Yu Chuansong,Yu Chunxu,Yu Zhitang,Yu Zhongqiang,Yuan Changzheng,Zhang Bingyun,Zhang Changchun,Zhang Dahua,Zhang Dehong,Zhang Huiling,Zhang Jian,Zhang Jiawen,Zhang Lin,Zhang Liangsheng,Zhang Qinjian,Zhang Shaoqiang,Zhang Xueyao,Zhang Yu,Zhang Yueyuan,Zhao Dixin,Zhao Haiwen,Zhao Jingwei,Zhao Meng,Zhao Weiren,Zheng Jianping,Zheng Linsheng,Zheng Zhipeng,Zhou Guangpu,Zhou Huashi,Zhou Li,Zhou Yuehua,Zhu Guoyi,Zhu Qiming,Zhu Yongsheng,Zhu Yucan,Zhuang Baoan. Measurement of the Branching Ratios for J/ψ→γπ⁰,γη'→3γon the BES. Chinese Physics C, 1997, 21(S2): 9-14.
[19]	Li Jin,Li Yushan,Qi Nading,Xue Shengtian,Wang Ping,Hu Tao,Ma Donghong,Zhang Jiawen,Zhu Qiming,Jiang Chunhua,Jiang Zhijin. Monte Carlo Study on the Strategy of Tau Mass Measurement. Chinese Physics C, 1995, 19(S2): 115-123.
[20]	Wu Jimin,He Zhuoxiu. The Implications of the New Measurement of LeptonτMass. Chinese Physics C, 1993, 17(S2): 125-131.

Access

Get Citation

et al. Measurement of J/ψ→η _cγ at KEDR[J]. Chinese Physics C, 2010, 34(6): 831-835. doi: 10.1088/1674-1137/34/6/035

et al. Measurement of J/ψ→η _cγ at KEDR[J]. Chinese Physics C, 2010, 34(6): 831-835. doi:10.1088/1674-1137/34/6/035 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2010-01-26
Revised: 1900-01-01

Article Metric

Article Views(3895)
PDF Downloads(500)
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

Measurement of J/ψ→η_cγ at KEDR

Received Date:2010-01-26

Accepted Date:1900-01-01

Available Online:2010-06-05

Abstract:

We present a study of the inclusive photon spectra from 5.9 million J/ψ decays collected with the KEDR detector at the VEPP-4M e⁺e^－collider. We measure the branching fraction of radiative decay J/ψ→η_cγ, η_cwidth and mass. Our preliminary results are:M(η_c)=2979.4±1.5±1.9 MeV/c²,Γ(η_c) = 27.8±5.1±3.3 MeV, B(J/ψ→η_cγ)=(2.34±0.15±0.40)%.

HTML

Reference (1)

Measurement of J/ψ→η_cγ at KEDR

Abstract：

References

Access

Article Metrics

Metrics

通讯作者:陈斌, bchen63@163.com

Email This Article