Nucleon resonances in 
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 reaction

Wei, Neng-Chang; Huang, F.; Nakayama, K.; Li, D. M.

doi:10.1103/physrevd.100.114026

Cited by 19 publications

(30 citation statements)

References 91 publications

(136 reference statements)

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“…The coupling g Λ * N K * is treated as a free parameter to be determined by a fit to the data. For the s-channel resonance exchanges, the Lagrangians for the electromagnetic interactions read [30,[36][37][38][39]]…”

Section: A Effective Lagrangiansmentioning

confidence: 99%

“…In the present work, we follow Refs. [36][37][38][39][40][41][42][43][44][45] to introduce an auxiliary current C µ to compensate the violation of the gauge invariance caused by the form factors and model the generalized interaction current M νµ int as…”

Section: Formalismmentioning

confidence: 99%

“…In the effective Lagrangian approach, phenomenological form factors are introduced in hadronic vertices to taken into account the internal structures of hadrons and to regularize the momentum dependence of the reaction amplitudes. In the present work, we use the following form factors for the t-channel meson exchanges [30,[36][37][38][39]…”

Section: Form Factorsmentioning

confidence: 99%

“…Our current knowledge of most of the N * 's is mainly coming from the production reactions of πN , ηN , KΛ, and KΣ channels. In recent years, the photoproductions of vector mesons, η ′ meson, and KY * (Y = Λ, Σ) have also been extensively investigated both experimentally and theoretically towards getting a better understanding of N * 's [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Photoproduction γp→K+Λ(1520) in an effective Lagrangian approach

et al. 2021

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In our previous work [Phys. Rev. C 101, 014003 (2020)], the photoproduction reaction γp → K * + Λ has been investigated within an effective Lagrangian approach. There, the reaction amplitudes were constructed by including the t-channel K, K * , and κ exchanges, the u-channel Λ, Σ, and Σ * exchanges, the s-channel N , N (2000)5/2 + , and N (2060)5/2 − exchanges, and the interaction current. It has been shown that the data on both the differential cross sections and the spin density matrix elements were simultaneously and satisfactorily described. In this paper, we study the photoproduction reaction γn → K * 0 Λ based on the same reaction mechanism as that of γp → K * + Λ with the purpose of getting a unified description of the data for both γp → K * + Λ and γn → K * 0 Λ within a same model. All hadronic coupling constants, form factor cutoffs, and the resonance masses and widths in the present calculations remain the same as in our previous work for γp → K * + Λ. The available differential cross-section data for γn → K * 0 Λ are well reproduced. Further analysis shows that the cross sections of γn → K * 0 Λ are dominated by the contributions of the t-channel K exchange, while the s-channel N (2000)5/2 + and N (2060)5/2 − exchanges provide considerable contributions as well.

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Section: A Effective Lagrangiansmentioning

confidence: 99%

Section: Formalismmentioning

confidence: 99%

Section: Form Factorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photoproduction γp→K+Λ(1520) in an effective Lagrangian approach

et al. 2021

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“…The prescriptions of the propagators for resonances with spin-1/2, -3/2, -5/2, and -7/2 adopted in the present work are [18][19][20][21]…”

Section: B Resonance Propagatorsmentioning

confidence: 99%

Analysis of the differential cross section and photon beam asymmetry data for $γp \to η^\prime p$

Zhang,

Wang,

Wei

et al. 2021

Preprint

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The photoproduction reaction of γp → η ′ p is investigated based on an effective Lagrangian approach in the tree-level approximation, with the purpose being to understand the reaction mechanisms and to extract the resonance contents and the associated resonance parameters in this reaction. Apart from the t-channel ρ and ω exchanges, s-and u-channel nucleon exchanges, and generalized contact term, the exchanges of a minimum number of nucleon resonances in the s channel are taken into account in constructing the reaction amplitudes to describe the experimental data. It is found that a satisfactory description of the available data on both differential cross sections and photon beam asymmetries can be obtained by including in the s channel the exchanges of the N (1875)3/2 − and N (2040)3/2 + resonances. The reaction mechanisms of γp → η ′ p are discussed and a prediction for the target nucleon asymmetries is presented.

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Exclusive photo- and electroproduction of vector mesons off protons

Kim

2023

J. Korean Phys. Soc.

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Nucleon resonances in γp→ωp reaction

Cited by 19 publications

References 91 publications

Photoproduction γp→K+Λ(1520) in an effective Lagrangian approach

Photoproduction γp→K+Λ(1520) in an effective Lagrangian approach

Analysis of the differential cross section and photon beam asymmetry data for $γp \to η^\prime p$

Exclusive photo- and electroproduction of vector mesons off protons

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