# Nucleon Resonances in $$\varvec{\gamma p \rightarrow K^{*+} \Lambda }$$ γ p → K ∗ + Λ

Nucleon Resonances in $$\varvec{\gamma p \rightarrow K^{*+} \Lambda }$$ γ p → K ∗ + Λ We use an effective Lagrangian approach in the tree-level approximation to analyze the high-precision cross-section data for $$\gamma p \rightarrow K^{*+}\Lambda$$ γ p → K ∗ + Λ reported by the CLAS Collaboration. Apart from the t-channel K, $$\kappa$$ κ , $$K^*$$ K ∗ exchanges, the s-channel nucleon (N) exchange, the u-channel $$\Lambda$$ Λ , $$\Sigma$$ Σ , $$\Sigma ^*(1385)$$ Σ ∗ ( 1385 ) exchanges, and the generalized contact current, we found that at least two nucleon resonances ( $$N^*$$ N ∗ ’s) should be considered to well describe the high-precision cross-section data. One is the $$N(2060){5/2}^-$$ N ( 2060 ) 5 / 2 - that is responsible for the shape of the angular distribution near the $$K^*\Lambda$$ K ∗ Λ threshold via its interference with the t-channel K exchange, and the other could be one of the $$N(2000){5/2}^+$$ N ( 2000 ) 5 / 2 + , $$N(2040){3/2}^+$$ N ( 2040 ) 3 / 2 + , $$N(2100){1/2}^+$$ N ( 2100 ) 1 / 2 + , $$N(2120){3/2}^-$$ N ( 2120 ) 3 / 2 - and $$N(2190){7/2}^-$$ N ( 2190 ) 7 / 2 - . The results for $$\Sigma$$ Σ , T and P are predicated and it is pointed out that more data on these observables are needed to further pin down the resonance contents and their associated parameters in this reaction. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Few-Body Systems Springer Journals

# Nucleon Resonances in $$\varvec{\gamma p \rightarrow K^{*+} \Lambda }$$ γ p → K ∗ + Λ

, Volume 59 (5) – May 29, 2018
6 pages

/lp/springer_journal/nucleon-resonances-in-varvec-gamma-p-rightarrow-k-lambda-p-k-gL0ff6LDCS
Publisher
Springer Journals
Subject
Physics; Particle and Nuclear Physics; Nuclear Physics, Heavy Ions, Hadrons; Atomic, Molecular, Optical and Plasma Physics
ISSN
0177-7963
eISSN
1432-5411
D.O.I.
10.1007/s00601-018-1408-5
Publisher site
See Article on Publisher Site

### Abstract

We use an effective Lagrangian approach in the tree-level approximation to analyze the high-precision cross-section data for $$\gamma p \rightarrow K^{*+}\Lambda$$ γ p → K ∗ + Λ reported by the CLAS Collaboration. Apart from the t-channel K, $$\kappa$$ κ , $$K^*$$ K ∗ exchanges, the s-channel nucleon (N) exchange, the u-channel $$\Lambda$$ Λ , $$\Sigma$$ Σ , $$\Sigma ^*(1385)$$ Σ ∗ ( 1385 ) exchanges, and the generalized contact current, we found that at least two nucleon resonances ( $$N^*$$ N ∗ ’s) should be considered to well describe the high-precision cross-section data. One is the $$N(2060){5/2}^-$$ N ( 2060 ) 5 / 2 - that is responsible for the shape of the angular distribution near the $$K^*\Lambda$$ K ∗ Λ threshold via its interference with the t-channel K exchange, and the other could be one of the $$N(2000){5/2}^+$$ N ( 2000 ) 5 / 2 + , $$N(2040){3/2}^+$$ N ( 2040 ) 3 / 2 + , $$N(2100){1/2}^+$$ N ( 2100 ) 1 / 2 + , $$N(2120){3/2}^-$$ N ( 2120 ) 3 / 2 - and $$N(2190){7/2}^-$$ N ( 2190 ) 7 / 2 - . The results for $$\Sigma$$ Σ , T and P are predicated and it is pointed out that more data on these observables are needed to further pin down the resonance contents and their associated parameters in this reaction.

### Journal

Few-Body SystemsSpringer Journals

Published: May 29, 2018

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