Journal of University of Science and Technology of China ›› 2016, Vol. 46 ›› Issue (7): 549-556.DOI: 10.3969/j.issn.0253-2778.2016.07.003
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SHEN Chengping
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Abstract: Exotic hadronic states beyond the conventional quark model (called charmoniumlike/bottomoniumlike states or XYZ particles) have been searched for and many candidates have been proposed including glueballs, hybrids, multi-quark states, hadron molecules, etc. Dramatic progress was made in the study of them after the running of the B-factories. The most recent results on the XYZ states at Belle are presented, including ① X states: the first observation of B0→X(3872)K+π- and evidence for B+→X(3872)K0π+; search for the Xb state; ② Y states: the updated results for the Y(4360) and Y(4660) and cross section measurements of e+e-→K+K-J/ψ and γχcJ; ③ Z states: the evidence for the Zc(4050)±→π± ψ(2S); search for the Zcs in e+e-→K+K-J/ψ.
Key words: XYZ, exotic states, Belle
SHEN Chengping, LI Zhuang (for the Belle Collaboration). XYZ states at Belle[J]. Journal of University of Science and Technology of China, 2016, 46(7): 549-556.
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URL: http://just-cn.ustc.edu.cn/EN/10.3969/j.issn.0253-2778.2016.07.003
http://just-cn.ustc.edu.cn/EN/Y2016/V46/I7/549