Observation of pentaquark states and prospectives of further studies

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2015,（17）
• 页码范围: 1549-1550
• 页数: 2页
• 语种: 中文
• DOI: 10.1007/s11434-015-0881-1

摘要

The quark model based on quark-antiquark mesons and three-quark baryons has been very successful in classifying the hadrons.However,quantum chromodynamics (QCD) does not forbid the existence of exotic hadronic states with other quark-gluon configurations,such as glueballs (with no quark),hybrids (with quarks and excited gluon),multiquark states (with more than three quarks),and hadron molecules (bound state of two or more hadrons).It is a long history of searching for all these kinds of states;however,no solid conclusion was reached until the recent discovery of tetraquark and pentaquark states.