Measurement of J/ψ Resonance Parameters

BES Collaboration

Chinese Physics C> 1995, Vol. 19> Issue(8) : 673-685

Measurement of J/ψ Resonance Parameters

BES Collaboration

Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039

Abstract
HTML
Reference
Related

PDF

Abstract：
The cross sections of e⁺e^－→hadrons,e⁺e^－,μ⁺μ^－have been measured in the vicinity of J/ψresonance at BES/BEPC.The fit of the observed cross sections gives the new results of J/ψ resonance parameters:the partial widths to hadrons,electrons and muous are Γh=74.1±8.1keV,Γe= 5.14±0.39keV and Γμ=5.13±0.52keV respectively;the total width Γ=84.4±8.9keV;the branching fractions Γh/Γ=(87.8±0.5)%,Γe/Γ=(6.09± 0.33)%,and Γμ/Γ=(6.08±0.33) %.

References

[1]

J.J.Aubert et al,Phys.Rev.Lett.33（1974）1404;J.E.Augustin et al,Phys.Rev.Lett,33（1974）1406.[2] M.Boyaski et al,Phys.Rev.Lett.,34（1975）1357.[3] R.BaldiniCelio et al,Phys.Lett.,58B（1975）471.[4] B.Esposito et al,Lett.NuovoCim,14（1975）73.[5] K.Brandelik et al,Z.Phys,Cl（1979）233.[6] Particle Data Group,Review of Particle Properties,Phys.Lett.,B239（1990）1[7] D.Coffman et al,Phys.Rev.Lett.68（1992）282.[8] P.A.Amstrong et al,Phys.Rev.,D47（1993）772.[9] Particle Data GroupReview of Particle Properties,Phys.Rev,D50（1994）1173.[10] J.Z.Bai et al,Nucl.Inst.Meth.,A344（1990）319;白景芝等，高能物理与核物理，16（199）769.[11] D.H.Ma et al,Absolute energy alibration and dermination of beamenergy spread for BEPC,BES internal report,Jun,14,1992.[12] 倪蕙苓等，高能物理与核物理，13（1989）870.朱永生等，高能物理与核物理，18（1994）503.[13] F.A.Berendsetal.,Nucl.Phys.,B228（983）537;Nucl.Phys,B177（1981）237;Nucl.Phys,B57C1973）381.[14] J.W.Zhang,The calculation of trigger efficiency for e+e– and mu+mu- eventsin BES,BES internal report,Jan,18,1993.[15] 过雅南等，高能物理与核物理，14（1990）1057[16] T.Sjostrand,CERN–TH,6488/92.[17] 苑长征，由道测量轻子.由φ（2S）→π+π-J/φ道测量J/φ轻子道衰变要支比，中国科学院高能物理研究所，硕士论文，1993年.

[1]	LIANG Jun , MA Zhong-Yu . Giant Monopole Resonance and Symmetry Energy. Chinese Physics C, 2007, 31(5): 470-474.
[2]	LI Yan-Song , LONG Gui-Lu , . Calculation of the Giant Monopole Resonance Using Relativistic Mean Field Theory. Chinese Physics C, 2004, 28(12): 1302-1306.
[3]	OUYANG Hua-Fu , FU Shi-Nian . Tuning and Measuring of RFQ with Resonantly Coupled Segments. Chinese Physics C, 2003, 27(6): 551-554.
[4]	LI Jin , LI Jian-Ping , TANG Yue-Li , LIU Shu-Dong , AN Li-Sheng , LI Tie-Hui , SHAO Bei-Bei . Measurement for Radiation Background of BES Detector. Chinese Physics C, 2003, 27(3): 183-188.
[5]	WANG Wen-Feng , ZHU Yong-Sheng , ZHANG Xue-Yao . Efficiency Correction in the Branching Fraction Determination of ψ′Hadronic Decays. Chinese Physics C, 2003, 27(2): 89-94.
[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]	WEN Wan-Xin , JIN Gen-Ming . Numerical Simulations on Efficiency and Measurement of Capabilities of BGO Detectors for High Energy γ Ray. Chinese Physics C, 2002, 26(11): 1178-1183.
[8]	BES Collaboration . Branching Ratios of J/ψ→π⁰3(π⁺π^－). Chinese Physics C, 2002, 26(1): 8-16.
[9]	CHEN YinBao , HUANG ZhiBin . Resonance, Chaos and Halo Formation in Space Charge Dominated Beams. Chinese Physics C, 2000, 24(6): 560-566.
[10]	Lei Yian , Lin Chunzhen , Zeng Jinyan . Comparison of the Spin Assignment and Experimental Determination of Superdeformed Bands. Chinese Physics C, 1997, 21(7): 648-656.
[11]	Wen Wanxin , Zhong Jiquan , Jin Genming . Relaxation of Isoscalar Giant Monopole Resonance. Chinese Physics C, 1996, 20(6): 546-553.
[12]	Huang Wenxue , Xu Xiaoji , Hu Zhiqiang , Ma Ruichang . First Experimental Determination of Half-Life for New Nuclide ⁶⁵Se. Chinese Physics C, 1996, 20(2): 113-118.
[13]	XU Shuwei , PAN Qiangyan , ZHANG Tianmei , YUAN Shuanggui , ZHANG Xueqian , SHI Shuanghui , TIAN Jiaqi , HUANG Wenda . Experimental Measurements for the Q_EC-Value of ¹⁸³Os-Decay. Chinese Physics C, 1993, 17(11): 985-987.
[14]	YUAN Shuang-Gui , ZHANG Tian-Mei , XU Shu-Wei , LI Wen-Xin , ZHANG Li , LIU Man-Qing , QU Xiu-Lan , LI Wei-Sheng . THE DETERMINATION OF ENDPOINT ENERGY FOR ²³⁵Th β-DECAY. Chinese Physics C, 1988, 12(5): 712-714.
[15]	XIONG Liang-Yue(L.Y.Xiong) . THE ACCURATE DETERMINATION OF SMALL VARIATIONS FOR THE PARAMETERS OF POSITRON LIFETIME SPECTRA IN AMORPHOUS ALLOY. Chinese Physics C, 1986, 10(5): 513-518.
[16]	WANG Li-Hong , ZENG Fan-An , ZHAO Xuan . RESONANCE GROUP METHOD FOR OMITTING EXCHANGE EFFECTS OF NUCLEAR CORE. Chinese Physics C, 1984, 8(3): 328-336.
[17]	MA Hui-Fang , YANG Zhen-Guo , GE Lin-Xiao . MEASUREMENT OF ISOMERIC CROSS-SECTION RATIO. Chinese Physics C, 1983, 7(5): 639-642.
[18]	TANG E-SHENG , LI JIAN-PING . DETERMINATION OF THE NEUTRON ATTENUATION LENGTH λ IN CONCRETE SHIELDING. Chinese Physics C, 1982, 6(5): 529-535.
[19]	LI JIAN-PING , CHANG WUI-KE , XIE YAN-FONG , TANG JIN-HUA , TANG E-SHENG . MEASUREMENT OF NATURAL BACKGROUND NEUTRON. Chinese Physics C, 1982, 6(6): 665-670.
[20]	YANG LI-MING , ZHONG YU-SHU , ZHOU ZHI-NING . THE ROLE PLAYED BY GR IN NEUTRON-NUCLEUS SCATTERING. Chinese Physics C, 1981, 5(2): 255-264.

Access

Get Citation

BES Collaboration. Measurement of J/ψ Resonance Parameters[J]. Chinese Physics C, 1995, 19(8): 673-685.

BES Collaboration. Measurement of J/ψ Resonance Parameters[J]. Chinese Physics C, 1995, 19(8): 673-685. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1900-01-01
Revised: 1900-01-01

Article Metric

Article Views(2528)
PDF Downloads(522)
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 Resonance Parameters

BES Collaboration

Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1995-08-05

Abstract: The cross sections of e⁺e^－→hadrons,e⁺e^－,μ⁺μ^－have been measured in the vicinity of J/ψresonance at BES/BEPC.The fit of the observed cross sections gives the new results of J/ψ resonance parameters:the partial widths to hadrons,electrons and muous are Γh=74.1±8.1keV,Γe= 5.14±0.39keV and Γμ=5.13±0.52keV respectively;the total width Γ=84.4±8.9keV;the branching fractions Γh/Γ=(87.8±0.5)%,Γe/Γ=(6.09± 0.33)%,and Γμ/Γ=(6.08±0.33) %.