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Chinese Physics C> 2004, Vol. 28> Issue(3) : 239-244 

ρ-ω Interference in J/ψ-Decays and ρ→ππ-π0 Decay

  •  Interdisciplinary Center for Theoretical Study,University of Science and Technology of China,Hefei 230026,China2 Institute of High Energy Physics,CAS,Beijing 100039,China

  • We study ρ-ω interference by analyzing J/ψ→π+π-π0π0. PDG-2002 data on J/ψ decays into PP and PV (P denotes pseudoscalar mesons; V, vector mesons) are used to fit a generic model which describes the J/ψ decays. From the fits, we obtain anomalously large branching ratio Br(ρ0→π+π-π0)≈10－3－10－2. A theoretical analysis for it is also provided, and the prediction is in good agreement with the anomalously large Br(ρ0→π+π-π0). By the fit, we also get the η-η′ mixing angle θ= -19.68°±1.49° and the constituent quark mass ratio mu/ms≈0.6 which are all reasonable.
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    [1] .WANG X J,JIANG J H,YAN M L.Eur.Phys.J.A,2002,14:219-2242.Part icle Data Group.Phys Rev.,2002,D66: 010001-4583.Vasserman I B et al.Sov J of Nucl Phys.,1988,48:480(translatedfrom YAF.,1988,48: 753)4.Bramon A,Casul leras J.Phys.Lett.,1986,173B: 975.Jousset J et al.Phys.Rev.,1990,D41: 13896.Baltrusaitis R M,Coffman D et al.Phys.Rev.,1985,D32: 28837.de Rujula A,Georgi H,Glashow S L.Phys.Rev.,1975,D12: 1478.Amet ller LI,Bramon A.Ann.Phys.(NY),1984,154: 3089.LI B A.Phys.Rev.,1995,D52: 516510.Coon S A,Barrett R C.Phys.Rev.,1987,C36: 218911.GAO D N,YAN M L.Eur.Phys.J.A,1998,3: 29312.Abrams G S et al.Phys.Rev.,1971,D4: 1092

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LIU Fang, LI Jin, HUANG Yi-Bin and YAN Mu-Lin. ρ-ω Interference in J/ψ-Decays and ρ→ππ-π0 Decay[J]. Chinese Physics C, 2004, 28(3): 239-244.
LIU Fang, LI Jin, HUANG Yi-Bin and YAN Mu-Lin. ρ-ω Interference in J/ψ-Decays and ρ→ππ-π0 Decay[J]. Chinese Physics C, 2004, 28(3): 239-244. shu
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Received: 2003-07-21
Revised: 1900-01-01
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ρ-ω Interference in J/ψ-Decays and ρ→ππ-π0 Decay

    Corresponding author: LIU Fang,
  • Interdisciplinary Center for Theoretical Study,University of Science and Technology of China,Hefei 230026,China2 Institute of High Energy Physics,CAS,Beijing 100039,China
  • Received Date: 2003-07-21
  • Accepted Date: 1900-01-01
  • Available Online: 2004-03-05

Abstract: We study ρ-ω interference by analyzing J/ψ→π+π-π0π0. PDG-2002 data on J/ψ decays into PP and PV (P denotes pseudoscalar mesons; V, vector mesons) are used to fit a generic model which describes the J/ψ decays. From the fits, we obtain anomalously large branching ratio Br(ρ0→π+π-π0)≈10－3－10－2. A theoretical analysis for it is also provided, and the prediction is in good agreement with the anomalously large Br(ρ0→π+π-π0). By the fit, we also get the η-η′ mixing angle θ= -19.68°±1.49° and the constituent quark mass ratio mu/ms≈0.6 which are all reasonable.

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