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

Zhang, Yu; Wang, Ai-Chao; Wei, Neng-Chang; Huang, Fei

doi:10.1103/PhysRevD.103.094036

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

May 1, 2021

10 pages

Published in:

Phys.Rev.D 103 (2021) 9, 094036

Published: May 27, 2021

e-Print:

2105.00186 [hep-ph]

DOI:

10.1103/PhysRevD.103.094036

View in:

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Abstract: (APS)

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.

Note:

10 pages, 5 figures. Version published in PRD. arXiv admin note: text overlap with arXiv:2002.04213

Strong Interactions
photon: beam
beam: asymmetry
nucleon: exchange
differential cross section
nucleon resonance
eta(958): photoproduction
tree approximation
contact interaction
effective Lagrangian

References(30)

Figures(8)

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