Determination of the Total Width of P-wave Charmonium State χ<SUB>c0</SUB>

BES Collaboration

Chinese Physics C> 1996, Vol. 20> Issue(12) : 1057-1067

Determination of the Total Width of P-wave Charmonium State χ_c0

BES Collaboration

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

Abstract
HTML
Reference
Related

PDF

Abstract：
The total width of the χ_c0 was determined by analysing γπ⁺π^－ and γK⁺K^－ final states of ψ(2S) decays based on 3.5 million ψ(2S) events produced from the BES detector at BEPC.The Monte Carlo simulated mass resolution,being normalized by that determined experimentally at the χ_c2,is used in fitting the observed signal of the χ_c0 and thus results in a best estimate of the total width of χ_c0,Γ_χc0=(15.0+3.2－2.8)MeV.Improved values for the branching fractions of χ_cJ going to π⁺π^－ and K⁺K^－ are found to be B(χ_c0→π⁺π^－)=(4.27±0.23±0.60)×10^－3,B(χ_c0→K⁺K^－)=(3.44±0.21±0.47)×10^－3,B(χ_c2→π⁺π^－)=(1.52±0.17±0.29)×10^－3 and B(χ_c2→K⁺K^－)=(5.2±1.1±1.8)×10^－4, respectively.

References

[1]

Particle Data Group,iPhys/i RAev.D50partI（1994）[2] J.E.Gaiseretal,iPhys/i.iRev/i.,D34（1986）711.[3] TA.Armstrongetal,iPhys/i.Aev.iLett/i,68（1992）1468.[4] GT.Bodwin,E.Braaten,G.P.Lepag,iPhys/i.iRev/i.,D46（1992）1914.[5] VL.Chernyak,R.A.Zhitnitsky,iPhys/i.Rep.,112（1984）123.[6] X.N.Wang,X.D.Xiang,T.Huang,Vomm.Theor.iPhys/i.,5（1986）123[7] BES Collab.,iNucl/i.Inst.Meth.,A344（1994）319[8] BES 合作组，高能物理与核物理，20（1996）97.[9] G.Karl,S.Meshkov,J.L.Rosner,iPhys/i.iRev/i.,D13（1976）1203;W.Tanenhaumetal.,iPhys/i.iRev/i.,D15（1978）731;M.Oregliaetal,iPhys/i.iRev/i.,D25（1982）2259.

Access

Get Citation

BES Collaboration. Determination of the Total Width of P-wave Charmonium State χ_c0[J]. Chinese Physics C, 1996, 20(12): 1057-1067.

BES Collaboration. Determination of the Total Width of P-wave Charmonium State χ_c0[J]. Chinese Physics C, 1996, 20(12): 1057-1067. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

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

Article Metric

Article Views(4126)
PDF Downloads(546)
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

Determination of the Total Width of P-wave Charmonium State χ_c0

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: 1996-12-05

Abstract: The total width of the χ_c0 was determined by analysing γπ⁺π^－ and γK⁺K^－ final states of ψ(2S) decays based on 3.5 million ψ(2S) events produced from the BES detector at BEPC.The Monte Carlo simulated mass resolution,being normalized by that determined experimentally at the χ_c2,is used in fitting the observed signal of the χ_c0 and thus results in a best estimate of the total width of χ_c0,Γ_χc0=(15.0+3.2－2.8)MeV.Improved values for the branching fractions of χ_cJ going to π⁺π^－ and K⁺K^－ are found to be B(χ_c0→π⁺π^－)=(4.27±0.23±0.60)×10^－3,B(χ_c0→K⁺K^－)=(3.44±0.21±0.47)×10^－3,B(χ_c2→π⁺π^－)=(1.52±0.17±0.29)×10^－3 and B(χ_c2→K⁺K^－)=(5.2±1.1±1.8)×10^－4, respectively.