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-  2015 

η_c→e~+e~-μ~+μ~-衰变研究 Muti-Lepton Decays of η_c Meson

Keywords: 粲夸克偶素,赝标量介子,矢量介子为主模型,达利兹衰变

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Abstract:

粲夸克偶素的能谱对于理解量子色动力学理论提供了一个很重要的检验根据.本文根据赝标介子到双虚光子过程的Lorentz结构在强子层面计算了ηc→e+e-μ+μ-过程散射振幅,讨论了基于单极点及双极点矢量介子为主模型以及量子色动力学模型的形式因子对衰变宽度及其随不变质量分布的影响,得到单极点及双极点形式因子对ηc→e+e-μ+μ-过程的衰变宽度,预言分别为3.248×10-7MeV和2.426×10-6MeV,双极点形式因子预言的不变质量分布在ρ介子质量区域有明显的峰状分布

References

[1]  Mitchell R E,Shepherd M R,Besson D,et al.J/ψandψ(2S)radiative transitions toηc[J].Physical Review Letters,2009,102(1):011801-1-5.
[2]  Di Salvo E,Rekalo M P,Tomasi G E.Theηcγγ*transition form factor in the decayηc→l+l-γand in the crossed channelsγe-→ηce-and e+e-→ηcγ[J].The European Physical Journal C-Particles and Fields,2000,16(2):295-302.
[3]  Kroll N M,Lee T D,Zumino B.Neutral vector mesons and the hadronic electromagnetic current[J].Physical Review,1967,157(5):1376-1399.
[4]  Ablikim M,Achasov M N,Ai X C,et al.Observation of a charged charmoniumlike structure in e+e-→π+π-J/ψat s=4.26 GeV[J].Physical Review Letters,2013,111(25):252001-1-1-7.
[5]  张素荣.测量ηc的质量与宽度和低动量π0的重建效率[D].桂林:广西师范大学,2011.Zhang S R.MeasureηcMass and Width and Reconstruction Efficiency of Low Momentumπ0[D].Guilin:Guangxi Normal University,2011(Ch).
[6]  Ablikim M,Achasov M N,Alberto D,et al.Measurements of the mass and width of theηcusing the decayψ(3686)→γηc[J].Physical Review Letters,2012,108(22):22202-1-7.
[7]  Vinokurova A,Kuzmin A,Eidelman S,et al.Study of B±→K±(KSKπ)0decay and determination ofηcandηc(2S)parameters[J].Physics Letters B,2011,706(2):139-149.
[8]  Lees J P,Poireau V,Prencipe E,et al.Measurement of theγγ*→ηctransition form factor[J].Physical Review D,2010,81(5):052010-1-8.
[9]  Ablikim M,Achasov M N,Albayrak O,et al.Observation of a charged charmoniumlike structure Zc(4020)and search for the Zc(3900)in e+e-→π+π-hc[J].Physical Review Letters,2013,111(24):242001-1-7.
[10]  Del Amo S P,Lees J P,Poireau V,et al.Observation ofηc(1S)andη+c(2S)decays to k+k-ππ-π0in two-photon interactions[J].Physical Review D,2011,84(1):012004-1-9.
[11]  Petri T.Anomalous Decays of Pseudoscalar Mesons[D].Bonn:University of Bonn,2010.

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