Moment Method for Spin Analysis of the Pseudoscalar Pair Produced in the Radiative J/ψ Decay

CHEN Shenjian; YAN Wuguang; LI Weiguo

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2024年10月30日

Chinese Physics C> 1993, Vol. 17> Issue(11) : 961-970

Moment Method for Spin Analysis of the Pseudoscalar Pair Produced in the Radiative J/ψ Decay

Institute of High Energy Physics,Academia Sinica,Beijing 100039

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Abstract：
The formalism and technique of the moment method for spin analysis of the boson X in J/ψ→γX,X→P₁P₂ are presented.The analysis technique is cited to study the spin of θ(1720) with Monte Carlo data samples.One finds that the spin of the boson X can be effectively determined by the moment method.As an example,the technique is used to measure the spin of the resonances in the low mass region of J/ψ→γK⁺K^－ channel at BES.It is found that the spin analysis strategy of the moment method is successful.

References

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L. Kopke and N. Werms,Phys. Reports,174(1989),67.[2]K. F. Einsweiler, Ph. D. Thesis , SLAC-Report-278 (1984 ) ; R. M. Baltrusaitis et al. , Phys. Rev. , D35 (1987 )，2077.[3]C. Edwards et al. ,Phys. Rev. Lett. ,48(1982),458.[4]J. Augustin et al. ,LAL/85-27,Ju1y,1985;1. Augustin et al, ,Phys. Rev. Lett. ,60(1988),2238.[5]чжоу гуан чжао жэтф 36(1959),909;M.Jacob and G. C. Wick,Ann. Phys. (N. Y.)，7 (1959 ) , 404 ; J. D. Rich-man, Ph. D. Thesis , CALT-68-1231, Appendix A ,1985.[6]W. G. Yan,Inner Report of IHEP,BES Note 86-13,1986;T, Z. Ruan,Proc. of the BIMP Symp. on Heavy FlavorPhysics , Peking , Aug. 11-20,1988 , P410-418;王泰杰等，高能物理与核物理，14(1990),385;严武光等，高能物理与核物理，14(1990),193;W. G. Yan,Proc. of HADRON'91，(1991),706.[7]S. U. Chung ,Phys. Rev. ,169 (1968) ,1342.[8]T. Bolton,Ph. D. Thesis,MIT(1988).[9]WA76 Collaboration,T. A. Armstrong et al. ,CERN/EP/89-70; Phys. Lett. ,227B(1989),186,[10]L. P. Chen et al. ,SLAC-PUB-5378(1990).[11]陈申见，硕士学位论文《JrK+K一衰变道的研究),1992.[12]W.G.Yan,Proc.of HADRON'91,(1991),94.

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CHEN Shenjian, YAN Wuguang and LI Weiguo. Moment Method for Spin Analysis of the Pseudoscalar Pair Produced in the Radiative J/ψ Decay[J]. Chinese Physics C, 1993, 17(11): 961-970.

CHEN Shenjian, YAN Wuguang and LI Weiguo. Moment Method for Spin Analysis of the Pseudoscalar Pair Produced in the Radiative J/ψ Decay[J]. Chinese Physics C, 1993, 17(11): 961-970. 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

Moment Method for Spin Analysis of the Pseudoscalar Pair Produced in the Radiative J/ψ Decay

Corresponding author: CHEN Shenjian,

Institute of High Energy Physics,Academia Sinica,Beijing 100039

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1993-11-05

Abstract: The formalism and technique of the moment method for spin analysis of the boson X in J/ψ→γX,X→P₁P₂ are presented.The analysis technique is cited to study the spin of θ(1720) with Monte Carlo data samples.One finds that the spin of the boson X can be effectively determined by the moment method.As an example,the technique is used to measure the spin of the resonances in the low mass region of J/ψ→γK⁺K^－ channel at BES.It is found that the spin analysis strategy of the moment method is successful.