Chinese Physics C > 2009, Vol. 33 > Issue(12): 1373-1376 DOI: 10.1088/1674-1137/33/12/058

Λ resonances studied in K^－p→Σ⁰π⁰in a chiral quark model

ZHONG Xian-Hui^,,
ZHAO Qiang

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A chiral quark-model approach is extended to the study of the KN scattering at low energies. The process of K－p→Σ⁰π⁰at P_K\≤800 MeV/c (i.e. the center mass energy W≤1.7 GeV) is investigated. The Λ(1405)S₀₁dominates the reactions over the energy region considered here. Around P_K=400 MeV/c, the Λ(1520)D₀₃is responsible for a strong resonant peak in the cross section. Our analysis suggests that there exist configuration mixings within the Λ(1405)S₀₁and Λ(1670)S₀₁as admixtures of the [70,²1,1/2] and [70,²8,1/2] configurations. The Λ(1405)S₀₁is dominated by [70,²1,1/2], and Λ(1670)S₀₁by [70,²8,1/2]. 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.

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ZHONG Xian-Hui and ZHAO Qiang. Λ resonances studied in K ^－p→Σ ⁰π ⁰in a chiral quark model[J]. Chinese Physics C, 2009, 33(12): 1373-1376. doi: 10.1088/1674-1137/33/12/058

ZHONG Xian-Hui and ZHAO Qiang. Λ resonances studied in K ^－p→Σ ⁰π ⁰in a chiral quark model[J]. Chinese Physics C, 2009, 33(12): 1373-1376. doi:10.1088/1674-1137/33/12/058 shu

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Received: 2009-08-07
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Λ resonances studied in K^－p→Σ⁰π⁰in a chiral quark model

Corresponding author:ZHONG Xian-Hui,

Received Date:2009-08-07

Accepted Date:1900-01-01

Available Online:2009-12-05

Abstract:

A chiral quark-model approach is extended to the study of the KN scattering at low energies. The process of K－p→Σ⁰π⁰at P_K\≤800 MeV/c (i.e. the center mass energy W≤1.7 GeV) is investigated. The Λ(1405)S₀₁dominates the reactions over the energy region considered here. Around P_K=400 MeV/c, the Λ(1520)D₀₃is responsible for a strong resonant peak in the cross section. Our analysis suggests that there exist configuration mixings within the Λ(1405)S₀₁and Λ(1670)S₀₁as admixtures of the [70,²1,1/2] and [70,²8,1/2] configurations. The Λ(1405)S₀₁is dominated by [70,²1,1/2], and Λ(1670)S₀₁by [70,²8,1/2]. 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.

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Λ resonances studied in K^－p→Σ⁰π⁰in a chiral quark model

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