2000/06/30 by Yongseok Oh, A. I. Titov, Alexander I. Titov +2
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevc.63.025201
published as Phys.Rev. C63 (2001) 025201 · 18 pages, REVTeX, 8 figures, to appear in Phys. Rev. C
arxiv created 2000/11/13 · openalex publication_date 2001/01/04 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The role of the nucleon resonances (N*) in \ensuremathω photoproduction is investigated by using the resonance parameters predicted by Capstick and Roberts [Phys. Rev. D 46, 2864 (1992); 49, 4570 (1994)]. In contrast with the previous investigations based on the SU(6)\ifmmode×\else\texttimes\fiO(3) limit of the constituent quark model, the employed N*\ensuremath→\ensuremathγN and N*\ensuremath→\ensuremathωN amplitudes include the configuration mixing effects due to the residual quark-quark interactions. The contributions from the nucleon resonances are found to be significant relative to the nonresonant amplitudes in changing the differential cross sections at large scattering angles and various spin observables. In particular, we suggest that a crucial test of our predictions can be made by measuring the parity asymmetry and beam-target double asymmetry at forward scattering angles. The dominant contributions are found to be from N(3)/(2)+(1910), a missing resonance, and N(3)/(2)^\ensuremath-(1960) which is identified as the D13(2080) of the Particle Data Group.