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arxiv: 1509.09025 · v1 · pith:ZZLGZSGUnew · submitted 2015-09-30 · ⚛️ nucl-th · nucl-ex

Nucleon Resonances Near 2 GeV

classification ⚛️ nucl-th nucl-ex
keywords nucleondatadeltaexperimentalnearquarkresonancessigma
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The nucleon resonances near 2 GeV are investigated through the $\Sigma$(1385) and $\Lambda(1520)$ photoproductions within a Regge-plus-resonance approach based on the new experimental data released by the CLAS Collaboration. The $\Delta(2000)$ and the $N(2120)$ are found essential to reproduce the experimental data and should be assigned as second $[\Delta 5/2^+]$ 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 $\Sigma(1385)K$ interaction rather than a three quark state.

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