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Low-energy reactions K- p -> Sigma(0)pi(0), Lambda pi(0), (K)over-bar(0)n and the strangeness S =-1 hyperons
Zhong, XH; 赵强;Zhao, Q
2013
发表期刊PHYSICAL REVIEW C
卷号88期号:1页码:15208
摘要A combined study of the reactions K- p -> Sigma(0)pi(0), Lambda pi(0), and (K) over bar (0)n at low energies is carried out with a chiral quark-model approach. Good descriptions of the experimental observations are obtained. The roles of the low-lying strangeness S = -1 hyperon resonances in these processes are carefully analyzed. We find that (i) in the K- p -> Sigma(0)pi(0) process, both Lambda(1405)S-01 and Lambda(1520)D-03 play dominant roles. Significant contributions of Lambda(1670)S-01 and Lambda(1690)D-03 could be seen around their threshold; (ii) in the K- p -> Lambda pi(0) process, some obvious evidence of Sigma(1775)D-15 and Sigma(1750)S-11 could be found. Some hints of Sigma(1620)S-11 might exist in the reaction as well. Sigma(1750)S-11 and Sigma(1620)S-11 should correspond to the representations [70, (4)8]S-11 and [70, (2)8]S-11, respectively; (iii) in the K- p -> (K) over bar (0)n process, the dominant resonances are Lambda(1405) and Lambda(1520). Some evidence of Lambda(1690)D-03, Sigma(1670)D-13, and Sigma(1775)D-15 could be seen as well. A weak coupling of Lambda(1670)S-01 to (K) over bar N should be needed in the reactions K- p -> Sigma(0)pi(0) and (K) over bar (0)n. Furthermore, by analyzing these reactions, we also find that the u-, t-channel backgrounds and s-channel Born term play crucial roles in the reactions: (i) The angle distributions of K- p -> Sigma(0)pi(0) are very sensitive to the u-, t-channel backgrounds and s-channel Lambda pole; (ii) the reaction K- p -> Lambda pi(0) is dominated by the u-, t-channel backgrounds and the ground P-wave state Sigma(1385)P-13; (iii) while the reaction K- p -> (K) over bar (0)n is governed by the t-channel background, and Sigma(1385)P-13 also plays an important role in this reaction.
学科领域Physics
DOI10.1103/PhysRevC.88.015208
收录类别SCI
WOS记录号WOS:000322576400011
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224500
专题理论物理室
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Zhong, XH,赵强;Zhao, Q. Low-energy reactions K- p -> Sigma(0)pi(0), Lambda pi(0), (K)over-bar(0)n and the strangeness S =-1 hyperons[J]. PHYSICAL REVIEW C,2013,88(1):15208.
APA Zhong, XH,&赵强;Zhao, Q.(2013).Low-energy reactions K- p -> Sigma(0)pi(0), Lambda pi(0), (K)over-bar(0)n and the strangeness S =-1 hyperons.PHYSICAL REVIEW C,88(1),15208.
MLA Zhong, XH,et al."Low-energy reactions K- p -> Sigma(0)pi(0), Lambda pi(0), (K)over-bar(0)n and the strangeness S =-1 hyperons".PHYSICAL REVIEW C 88.1(2013):15208.
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