| Study of ■ decay parameter in J/ψ→Λ■ decay |
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| 作者单位： | Department of Physics and Institute of Theoretical Physics，Nanjing Normal University，Institute of High Energy Physics，CAS，P.O.Box 918(4) |
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| 摘 要： | The helicity amplitudes for J/ψ→Λ■ and the relevant background decays are presented for measuring the ■ decay parameter α (■→π ) in J/ψ→Λ■. The Monte Carlo (MC) simulations based on the helicity amplitudes information are carried out. The likelihood fit method to determine the ■ decay parameter is presented. Based on the MC generated sample, the sensitivity of the measurement for α has been estimated, which shows that the J/ψ→Λ■ channel can be used to measure the ■ decay parameter α (■→π ) well.
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| 关 键 词： | parity asymmetry hyperon nonleptonic decays J/ψ decays |
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