Revisiting the determining fraction of glueball component in f0 mesons via radiative decays of J/Ψ

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: PARTICLES AND FIELDS
• 页码范围: 133-143
• 页数: 11页
• 语种: 英文
• DOI: 10.1088/1674-1137/abccad

摘要

QCD theory predicts the existence of glueballs,but so far all experimental endeavors have failed to identify any such states.To remedy this discrepancy between QCD,which has proven to be a successful theory for strong interactions,and the failure of experimental searches for glueballs,one is tempted to accept the promising in-terpretation that the glueballs mix with regular qq states of the same quantum numbers.The lattice estimate of the masses of pure 0++glueballs ranges from 1 to 2 GeV,which is the region of the fo family.Thus many authors sug-gest that the fo mesonic series is an ideal place to study possible mixtures of glueballs and qq.In this paper,follow-ing the strategy proposed by Close,Farrar and Li,we try to determine the fraction of glueball components in fo mesons using the measured mass spectra and the branching ratios of J/Ψ radiative decays into fo mesons.Since the pioneering papers by Close et al.,more than 20 years have elapsed and more accurate measurements have been done by several experimental collaborations,so it is time to revisit this interesting topic using new data.We suppose fo(500)and fo(980)to be pure quark states,while for fo(1370),fo(1500)and fo(1710),to fit both the experimental data of J/ifi radiative decay and their mass spectra,glueball components are needed.Moreover,the mass of the pure 0++glueball is phenomenologically determined.