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| Evidence for a new resonance Σ~* (1380) with J~P=1/2~(-*) | |
| 作者单位： | WU Jia-Jun(Institute of High Energy Physics,CAS,P.O.Box 918(4),Beijing 100049,China);S.Dulat(School of Physics Science and Technology,Xinjiang University,Urumqi 830046,China;Theoretical Physics Center for Science Facilities,CAS,Beijing 100049,China);ZOU Bing-Song(Institute of High Energy Physics,CAS,P.O.Box 918(4),Beijing 100049,China;Theoretical Physics Center for Science Facilities,CAS,Beijing 100049,China) |
| 基金项目： | National Natural Science Foundation of China，Chinese Academy of Sciences Knowledge Innovation Project，Ministry of Science and Technology of China |
| 摘 要： | A new particle Σ * with J P = 1/2-was predicted by unquenched quark models with its mass around the well established Σ * (1385) with J P = 3/2 + .Here we re-examine some old data of the K￣p→Λπ*π + reaction.Firstly we re-fit the data for kaon beam momenta in the range of 1.0 - 1.8 GeV.Secondly we study the reaction at the energies around Λ*(1520) peak.Both studies show evidence for the existence of Σ*with J P = 1/2-around 1380 MeV.Higher statistic data on relevant reactions are needed to clarify the situation. |
| 关 键 词： | Σ* K-p→Λπ-π+reaction |
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