Building up the spectrum of pentaquark states as hadronic molecules

• 作者: Bing-Song Zou
• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2021,（13）
• 所属期刊栏目: NEWS & VIEWS
• 页码范围: 1258-1259
• 页数: 2页
• 语种: 英文

摘要

Following the observation of three narrow N* pentaquark states with hidden charm,Pc(4312),Pc(4440)and Pc(4457)[1,2],very recently,the LHCb Collaboration reported the first evidence for their strange ∧* counterparts,PCS(4459),in the J/ψ∧ invariant mass distribution[3].While the Pc(4312)+sits 6 MeV below the(D)0∑+C threshold,Pc(4440)and Pc(4457)sit 20 and 3 MeV below the(D)0∑+C threshold,respectively,the newly observed PCS(4459)is just about 19 MeV below the(D)*0Ξ0C threshold.These narrow N* and ∧*pentaquark states are consistent with the corresponding theoreti-cal predictions[4]based on the hadronic molecular picture within theoretical uncertainties[5-8].