摘要
Based on the naive quark model, we calculate angular distributions for heavy quarkonium decays into pN＊ （1440）, decuplet baryon pairs, and octet-decuplet baryon pairs. The general formulae of angular distributions are given explicitly. Quark mass effects on the violation of the helicity conservation and the prospect to look for them in J/ψ hadronic decays are discussed.
Based on the naive quark model, we calculate angular distributions for heavy quarkonium decays into pN＊ （1440）, decuplet baryon pairs, and octet-decuplet baryon pairs. The general formulae of angular distributions are given explicitly. Quark mass effects on the violation of the helicity conservation and the prospect to look for them in J/ψ hadronic decays are discussed.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 10491303 and 10521003, the Knowledge Innovation Project of Chinese Academy of Sciences under Contract No U-612 （IHEP）.
