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.

[1]	Jian-Jun He , Ivano Lombardo , Daniele Dell'Aquila , Yi Xu , Li-Yong Zhang , Wei-Ping Liu . Thermonuclear ¹⁹F(p,α₀)¹⁶O reaction rate. Chinese Physics C, 2018, 42(1): 015001. doi: 10.1088/1674-1137/42/1/015001
[2]	Yu Tian , Ze Zhao , Ai-Lin Zhang . Study of radially excited D_s(2¹S₀) and D_s(3P). Chinese Physics C, 2017, 41(8): 083107. doi: 10.1088/1674-1137/41/8/083107
[3]	Zalak Shah , Kaushal Thakkar , Ajay Kumar Rai , P. C. Vinodkumar . Mass spectra and Regge trajectories of Λ_c⁺, Σ_c⁰, Ξ_c⁰ and Ω_c⁰ baryons. Chinese Physics C, 2016, 40(12): 123102. doi: 10.1088/1674-1137/40/12/123102
[4]	KANG Xian-Wei , LI Hai-Bo , LU Gong-Ru , ZOU Bing-Song . Partial wave analysis of ψ′→γχ_c0→γpK^－Λ used for searching for baryon resonance. Chinese Physics C, 2010, 34(8): 1061-1068. doi: 10.1088/1674-1137/34/8/005
[5]	ZHONG Xian-Hui , ZHAO Qiang . Λ resonances studied in K^－p→Σ⁰π⁰ in a chiral quark model. Chinese Physics C, 2009, 33(12): 1373-1376. doi: 10.1088/1674-1137/33/12/058
[6]	GUO Bing , LI Zhi-Hong , LIU Wei-Ping , BAI Xi-Xiang . Study of Halo for the Ground State and Proton Widths for the First Two Excited States of ²⁷P. Chinese Physics C, 2006, 30(S2): 183-185.
[7]	PING Rong-Gang , YUAN Chang-Zheng . Baryon Resonance in χ_c0→BBMM Decays. Chinese Physics C, 2006, 30(8): 731-735.
[8]	XU Jia-Jun , WANG Jia , ZHUANG Chao , ZHUANG Peng-Fei . Charmonium Formation and Suppression in Nuclear Matter. Chinese Physics C, 2005, 29(5): 442-446.
[9]	WANG Gang , LI Xian-Hui , ZHOU Zhi-Ning , YANG Ze-Sen . qq³P₀ Condensation Under an Modified r² Potential. Chinese Physics C, 2002, 26(3): 259-265.
[10]	Yao Xiaoxia , Zhang Xiaofei , Qiao Congfeng , Zhao Weiqin . Charmonium Production and Absorption in P－A and A－A Collision. Chinese Physics C, 1999, 23(3): 268-280.
[11]	Liu Bo , Dong Yubing . Color Screeing and Dissociation of Heavy Quarkonium. Chinese Physics C, 1996, 20(2): 153-158.
[12]	Chao Weiqin , Liu Bo . Transverse Energy Dependence of Yield of Charmonium Production in Relativistic Heavy Ion Collisions. Chinese Physics C, 1995, 19(1): 49-52.
[13]	Peng Liangqiang , Zhang Tianbao , Wang Haidong , Meng Bonian , Yin Guoli . Improved Measurement of γ-Energy from Parapositronium 2γ-Decay. Chinese Physics C, 1995, 19(11): 987-990.
[14]	Liu Bo , Zhao Weiqin . Contribution Due to Gluon Shadowing and Final-State Interactions to Charmonium/Bottonium Suppression in h-A Collisions. Chinese Physics C, 1994, 18(5): 443-447.
[15]	LUO Zhen-Fei , QIU Xi-Jun . Mass Splittings of L=1 States of Quarkonium and Lorentz Structure of Long-rang Confinement Potential. Chinese Physics C, 1992, 16(8): 716-722.
[16]	ZHANG Tian-Bao , WANG Hai-Dong , SHEN Zhi-Qi . Measurement of the Gamma Ray Energy in Parapositronium 2γ Decay. Chinese Physics C, 1991, 15(6): 486-492.
[17]	HUO Yu-Kun , LIU Jian-Feng . INVESTIGATIONS OF p-WAVE NEUTRON RESONANCE NEAR NEUTRON BINDING ENERGY. Chinese Physics C, 1986, 10(4): 490-496.
[18]	ZHANG Tian-Bao , TANG Xiao-Wei , WANG Yun-Yu , LI Yao-Qing , YIU Ke , WANG Shao-Jie . MEASUREMENT OF THE WHOLE GAMMA-RAY ENERGY SPECTRUM IN o-Ps 3 GAMMA-DECAY. Chinese Physics C, 1984, 8(4): 385-391.
[19]	LI Yang-Guo , LO Shui-Yin . THE D-WAVE EFFECT OF p-D HIGH ENERGY ELASTIC SCATTERING. Chinese Physics C, 1984, 8(4): 497-501.
[20]	WANG Zheng-Ben . THE EFFECTS OF THE CHARM STATE IN e-p DEEP INELASTIC SCATTERING. Chinese Physics C, 1984, 8(5): 548-553.

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(2345)
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.