2019/08/31 by Neng-Chang Wei, N. C. Wei, Fei Huang +3 · 19 citations
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Algorithm #Amplitude #Computer science #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.100.114026
published in Physical review. D/Physical review. D. 100(11) (American Physical Society) · 22 pages, 17 figures, version to appear in PRD
openalex created_date 2019/08/13 · arxiv created 2019/11/26 · openalex publication_date 2019/12/16 · arxiv updated 2019/12/25 · openalex updated_date 2026/08/05
The most recent high-precision data on spin observables \mathrm\ensuremathΣ, T, P^\ensuremath', E, F, and H reported by the CLAS Collaboration together with the previous data on differential cross sections and spin-density-matrix elements reported by the CLAS, A2, GRAAL, SAPHIR, and CBELSA/TAPS Collaborations for the reaction \ensuremathγp\ensuremath→\ensuremathωp are analyzed within an effective Lagrangian approach. The reaction amplitude is constructed by considering the t-channel \ensuremathπ and \ensuremathη exchanges, the s-channel nucleon and nucleon resonances exchanges, the u-channel nucleon exchange, and the generalized contact current. The latter accounts effectively for the interaction current and ensures that the full photoproduction amplitude is gauge invariant. It is shown that all the available CLAS data can be satisfactorily described by considering the N(1520)3/2^\ensuremath-, N(1700)3/2^\ensuremath-, N(1720)3/2+, N(1860)5/2+, N(1875)3/2^\ensuremath-, N(1895)1/2^\ensuremath-, and N(2060)5/2^\ensuremath- resonances in the s-channel. The parameters of these resonances are extracted and compared with those quoted by PDG.