Belle实验上关于最新的
XYZ
粒子的实验结果

doi:10.3969/j.issn.0253-2778.2016.07.003

中国科学技术大学学报 ›› 2016, Vol. 46 ›› Issue (7): 549-556.DOI: 10.3969/j.issn.0253-2778.2016.07.003

Belle实验上关于最新的 XYZ 粒子的实验结果

沈成平

北京航空航天大学物理科学与核能工程学院,北京 100191

收稿日期:2015-11-30 修回日期:2016-04-20 出版日期:2016-07-31 发布日期:2016-07-31
作者简介:SHEN Chengping (corresponding author), male, born in 1978, PhD/Prof. Research field: particle physics experiment.

XYZ states at Belle

SHEN Chengping

School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

Received:2015-11-30 Revised:2016-04-20 Online:2016-07-31 Published:2016-07-31
Contact: SHEN Chengping

摘要/Abstract

摘要： 实验上寻找超出传统夸克标准模型的激发态强子(也称为类粲偶素/类底偶素或XYZ粒子)已经很多年，建议过很多的激发态强子的候选者，包括胶球、混杂态、多夸克态、强子分子态等.自从B工厂运行以来，这方面的研究已经取得了巨大的进步.本文给出来自Belle实验的关于XYZ粒子的最新实验成果，包括① X态:首次观测到B0→X(3872)K+π-过程的信号以及B+→X(3872)K0π+过程存在的迹象;寻找Xb态; ② Y态: 更新的Y(4360)和Y(4660)共振参数的结果以及更新的测量e+e-→K+K-J/ψ和γχcJ过程的散射截面;③ Z态: 发现带电的Zc(4050)±→π± ψ(2S)存在的迹象以及在e+e-→K+K-J/ψ过程中寻找Zcs的态.

关键词: XYZ, 激发态强子, Belle实验

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

沈成平，李壵(Belle合作组). Belle实验上关于最新的 XYZ 粒子的实验结果[J]. 中国科学技术大学学报, 2016, 46(7): 549-556.

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.

Belle实验上关于最新的 XYZ 粒子的实验结果

XYZ states at Belle

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