Study of nucleon resonances in a chiral quark model via η productions

摘要：

In this report we investigate η-meson productions on the proton via electromagnetic and hadron probes in a chiral quark model approach. The observables, such as, differential cross section and beam asym-metry for the two productions are calculated and compared with the experiment. The five known resonances S_(11)(1535), S_(11)(1650), P_(13)(1720), D_(13)(1520), and F_(15)(1680) are found to be dominant in the reaction mech-anisms in both channels. Significant contribution from a new S_(11) resonances are deduced. For the so-called missing resonances, no evidence is found within the investigated reactions. The partial wave amplitudes for π~-p→ηn are also presented.

关键词： N~* chiral quark model photoproduction

作者: HE Jun B.Saghai

作者单位: Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China Institut de Recherche sur les lois Fondamentales de lUnivers,IRFU,CEA/Saclay,91191 Gif-sur-Yvette,F

会议类型: 国际会议

会议名称: The 12th International Workshop on the Physics Ezcited Nucleon(2009核子共振态物理国际研讨会)

会议地点: 北京

会议语种:英文

页码: 1389-1392

在线出版日期: 2009-04-19（万方平台首次上网日期，不代表论文的发表时间）