Chinese Physics C > 1996, Vol. 20 > Issue(S2): 135-140

Angular Distribution of the Process e⁺e^-→J/ψ→γ+X(J^Pc),X→BB,and the Spin-Parity Analysis of the Resonance X

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China

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Abstract：
The process e ⁺e ^-→J/ ψ→ γ+X( J ^Pc),X→B B(baryon and anti-baryon) is analyzed by using the helicity angular distribution method. The angular and the projection angular distribution formulas for different spin-parity of the resonance X are obtained. With these formulas, we can determine the spin of the resonance X through the analysis of the experimental data.
- spin parity,
- resonance,
- angular distribution,
- helicity amplitude
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Zhang Lin, Yu Hong and Shen Qixing. Angular Distribution of the Process e ⁺e ^-→J/ ψ→ γ+X( J ^Pc),X→B B,and the Spin-Parity Analysis of the Resonance X[J]. Chinese Physics C, 1996, 20(S2): 135-140.

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Received: 1995-03-10

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Supported by the National Natural Science Foundation of China.

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