Dynamical Coupled-Channel Approach to Omega Meson Production with Pions and Photons

Conference · Mon Oct 01 04:00:00 EDT 2007

OSTI ID:1967338

Paris, Mark ^[1]; Lee, Tsung-Shung ^[2]; Sato, Toru ^[3]

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1. George Washington University, Washington, DC
2. Argonne National Lab. (ANL), Argonne, IL (United States)
3. Osaka University

A dynamical coupled-channel formalism is employed in the study of pion and photon induced omega meson production. We consider center-of-mass energies in the region from threshold to 2 GeV. Extensive optimization on parallel processors has been used to determine the parameters of the model hadronic Lagrangian. Non-resonant and resonance parameters are extracted from a least-squares global fit to the available observed differential cross section for piN --> omegaN and gammaN --> omegaN. The extracted strong and electromagnetic couplings are then used to calculate the electroproduction data. The importance of coupled-channel and off-shell effects is emphasized in comparisons to approximate K matrix and other models.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1967338
• Report Number(s): JLAB-THY-07-810; DOE/OR/23177-5929
• Country of Publication: United States
• Language: English