Dibaryons:Molecular versus compact hexaquarks

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: REVIEWS
• 页码范围: 23-38
• 页数: 16页
• 语种: 英文
• DOI: 10.1088/1674-1137/abcd8e

摘要

Hexaquarks constitute a natural extension of complex quark systems,just as tetra-and pentaquarks do.To this end,the current status of df(2380)in both experiment and theory is reviewed.Recent high-precision meas-urements in the nucleon-nucleon channel and analyses thereof have established d*(2380)as an indisputable reson-ance in the long-sought dibaryon channel.Important features of this I(JP)= 0(3+)state are its narrow width and deep binding relative to the △(1232)△(1232)threshold.Its decay branchings favor theoretical calculations predict-ing a compact hexaquark nature of this state.We review the current status of experimental and theoretical studies on d*(2380)as well as new physics aspects it may bring in future.In addition,we review the situation at the △(1232)N and N*(1440)N thresholds,where evidence for a number of resonances of presumably molecular nature has been found-similar to the situation in charmed and beauty sectors.Finally,we briefly discuss the situation of dibaryon searches in the flavored quark sectors.