The J + - + - and J/ + - 0 0 decays have been studied by the DM2 experiment from 8.6×106 J/ s. Both decays exhibit a large pseudoscalar dynamics. Three JPC=0-+ resonant states (more than 3500 events, globally) decaying into 0 0 and with less statistical significance into + - are observed. Their branching ratios into 0 0 and + - support an IG=0+ assignment. These states, named (1500), (1800), and (2100), are not associated with well-established resonances. © 1989 The American Physical Society.
1st Observation of 3 Pseudoscalar States In J/psi-]gamma-rho-rho Decay
BISELLO, DARIO;BUSETTO, GIOVANNI;SARTORI, PAOLO;
1989
Abstract
The J + - + - and J/ + - 0 0 decays have been studied by the DM2 experiment from 8.6×106 J/ s. Both decays exhibit a large pseudoscalar dynamics. Three JPC=0-+ resonant states (more than 3500 events, globally) decaying into 0 0 and with less statistical significance into + - are observed. Their branching ratios into 0 0 and + - support an IG=0+ assignment. These states, named (1500), (1800), and (2100), are not associated with well-established resonances. © 1989 The American Physical Society.
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