Λ resonances studied in K^-p→Σ~0π~0 in a chiral quark model  

Λ resonances studied in K^-p→Σ~0π~0 in a chiral quark model

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作  者:钟显辉 赵强 

机构地区:[1]Department of Physics, Hunan Normal University [2]Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences [3]Institute of High Energy Physics, Chinese Academy of Sciences

出  处:《Chinese Physics C》2009年第12期1377-1380,共4页中国物理C(英文版)

基  金:Supported by National Natural Science Foundation of China (10675131, 10775145);Chinese Academy of Sciences (KJCX3-SYW-N2)

摘  要:A chiral quark-model approach is extended to the study of the KN scattering at low energies. The process of K-p →∑0π0 at PK 〈 800 MeV/c (i.e. the center mass energy W 〈 1.7 GeV) is investigated. The A(1405)S01 dominates the reactions over the energy region considered here. Around PK -- 400 MeV/c, the A(1520)D03 is responsible for a strong resonant peak in the cross section. Our analysis suggests that there exist configuration mixings within the A(1405)S01 and A(1670)S01 as admixtures of the [70,2 1,1/2] and [70,2 8,1/2] configurations. The A(1405)SOl is dominated by [70,2 1, 1/2], and A(1670)Sol by [70,2 8,1/2]. The non-resonant background contributions, i.e. u-channel and t-channel, also play important roles in the explanation of the angular distributions due to amplitude interferences.A chiral quark-model approach is extended to the study of the KN scattering at low energies. The process of K-p →∑0π0 at PK 〈 800 MeV/c (i.e. the center mass energy W 〈 1.7 GeV) is investigated. The A(1405)S01 dominates the reactions over the energy region considered here. Around PK -- 400 MeV/c, the A(1520)D03 is responsible for a strong resonant peak in the cross section. Our analysis suggests that there exist configuration mixings within the A(1405)S01 and A(1670)S01 as admixtures of the [70,2 1,1/2] and [70,2 8,1/2] configurations. The A(1405)SOl is dominated by [70,2 1, 1/2], and A(1670)Sol by [70,2 8,1/2]. The non-resonant background contributions, i.e. u-channel and t-channel, also play important roles in the explanation of the angular distributions due to amplitude interferences.

关 键 词:strange resonance quark model meson-baryon interaction 

分 类 号:O572.33[理学—粒子物理与原子核物理] TN912.3[理学—物理]

 

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