SHEN, QX , CCAST,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA.
部门归属:
CHINESE ACAD SCI,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA; CHINESE ACAD SCI,INST HIGH ENERGY PHYS,BEIJING 100039,PEOPLES R CHINA
英文摘要:
The three-step two-body decay process of J/psi, J/psi --> V + X, X --> P-1 + Y, Y --> P-2 + P-3 (where V and P-i represent vector and pseudoscalar mesons, respectively) is discussed by using the generalized moment analysis method. The spin-parity of the boson resonance X and the ratios of helicity amplitudes of the process can be determined in terms of measuring the corresponding moments except for a very special case.
