Journalartikel

Jahr der Veröffentlichung: 2005

Zeitschrift: Physical Review C

Bandnummer: 71

Heftnummer: 5

ISSN: 0556-2813

eISSN: 1089-490X

DOI Link: https://doi.org/10.1103/PhysRevC.71.055206

Verlag: American Physical Society

Abstract: 
The pion- and photon-induced reactions for the final states gamma N, pi N, 2 pi N, eta N, and omega N are studied within a coupled-channel effective Lagrangian approach in the energy region from the pion threshold up to 2 GeV. To investigate the role of the nucleon resonances in the different reactions we include all known states with spin -1/2, -3/2, and -5/2 and masses below 2 GeV. We find a strong contribution from the D-15(1675) resonance to the pi N ->omega N reaction. While the F-15(1680) state only slightly influences the omega meson production in the pi N scattering its role is enhanced in the omega photoproduction due to the large electromagnetic coupling of this resonance. We predict the beam asymmetry Sigma(X) to be a negative in the gamma p -> omega p reaction near to the threshold. Above the 1.85 GeV the asymmetry is found to change its sign and becomes positive at forward directions. The presented findings can be experimentally tested at GRAAL, CLAS, and CB-ELSA facilities.

Harvard-Zitierstil: Shklyar, V., Lenske, H., Mosel, U. and Penner, G. (2005) Coupled-channel analysis of ω-meson production in πN and γN reactions for c.m. energies up to 2 GeV, Physical Review C, 71(5), Article 055206. https://doi.org/10.1103/PhysRevC.71.055206

APA-Zitierstil: Shklyar, V., Lenske, H., Mosel, U., & Penner, G. (2005). Coupled-channel analysis of ω-meson production in πN and γN reactions for c.m. energies up to 2 GeV. Physical Review C. 71(5), Article 055206. https://doi.org/10.1103/PhysRevC.71.055206