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摘要
<正>Besides the observed quark-antiquark and three-quark states,the quark model predicts other states with integral charges,such as ■ (tetraquarks) and ■ (pentaquarks).In 2015,the LHCb Collaboration observed J/ψp resonances consistent with pentaquarks in Λb0→J/ψpK- decays [1],
