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

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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，，硕士论文，1993年.

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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

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Received: 1900-01-01
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

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) %.