J /. psi. r arrow vector+pseudoscalar decays and the quark content of. eta. and. eta. prime
Physical Review D（1990）
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measuring instruments,mesons,functions,lie groups,particle decay,elementary particles,perturbation theory,quark model,massless particles,mathematical model,bosons,gluons,photons,mathematical models,lie group,symmetry groups,spectrometers,branching ratio,decay,hadrons,wave functions
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