2000/11/19 by Q. Zhao · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.63.035205
Revtex, 3 eps figures, 1 table; Resubmitted to Phys. Rev. C
arxiv created 2000/11/19 · openalex publication_date 2001/02/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In this work, the \ensuremathη^\ensuremath' meson photoproduction near threshold is studied in the quark model framework. A pseudovector effective Lagrangian is introduced for the \ensuremathη^\ensuremath'NN coupling and the newly published data from the SAPHIR Collaboration provide good constraints to this parameter. Corrections of order O(1/mq2) for the electromagnetic interaction vertex are taken into account, which produce corrections of order O(1/mq3) to the transition amplitude for \ensuremathγ\stackrel\ensuremath→p\ensuremathη^\ensuremath'p. Some low-lying resonances, S11(1535), P13(1720), and P13(1900), are found to have significant contributions. A bump structure around E_\ensuremathγ\ensuremath≈2 GeV is found arising from the n=3 terms in the harmonic oscillator basis. The beam polarization asymmetries are predicted and can be tested against the forthcoming data from GRAAL.