Study of (∧) decay parameter in J/ψ→∧(∧)decay

The helicity amplitudes fot J/ψ→∧(∧)and the relevant background decays are presented for measuring the A decay parameter α+((∧)→(p)π)in J/ψ→∧(∧).The Monte Carlo(MC)simulations based on the helicity amplitudes information are carried out.The likelihood fit method to determine the A 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→∧(∧) channel can be used to measure the A decay parameter α+((∧)→(p)π+)well.

作 者： ZHONG Bin PING Rong-Gang XIAO Zhen-Jun   作者單位： ZHONG Bin(Department of Physics and Institute of Theoretical Physics,Nanjing Normal University,Nanjing 210097,China;Institute of Hish Energy Physics,CAS,P.O.Box 918(4),Beijing 100049,China)

PING Rong-Gang(Institute of Hish Energy Physics,CAS,P.O.Box 918(4),Beijing 100049,China)

XIAO Zhen-Jun(Department of Physics and Institute of Theoretical Physics,Nanjing Normal University,Nanjing 210097,China) 

刊 名： 中國物理C（英文版）  ISTIC 英文刊名： CHINESE PHYSICS　C  年，卷(期)： 2008 32(9)  分類號： O4  關鍵詞： parity asymmetry   hyperon nonleptonic decays   J/ψ decays  

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