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arXiv 1509.09025nucl-thnucl-ex
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2 GeV附近的核子共振

Nucleon Resonances Near 2 GeV

Jun He

摘要:

基于CLAS合作组公布的最新实验数据,采用Regge加共振方法,通过$Σ$(1385)和$Λ(1520)$的光生效应研究了2GeV附近的核子共振.发现$Δ(2000)$和$N(2120)$对于再现实验数据是必不可少的,在组分夸克模型中应分别指定为第二$[Δ5/2^+]$和第三$[N3/2^-]$。结合能和衰变模式的计算支持$N(1875)$是来自于$Σ(1385)K$相互作用,而不是三夸克态。$N(1875)$在PDG中被列为第三个$N3/2^-$核子共振,而不是$N(2120)$。

英文摘要:

The nucleon resonances near 2 GeV are investigated through the $Σ$(1385) and $Λ(1520)$ photoproductions within a Regge-plus-resonance approach based on the new experimental data released by the CLAS Collaboration. The $Δ(2000)$ and the $N(2120)$ are found essential to reproduce the experimental data and should be assigned as second $[Δ5/2^+]$ and third $[N3/2^-]$ in the constituent quark model, respectively. A calculation of the binding energy and decay pattern supports that the $N(1875)$, which is listed in the PDG as the third $N3/2^-$ nucleon resonance instead of the $N(2120)$, is from the $Σ(1385)K$ interaction rather than a three quark state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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