Near threshold electroproduction of the omega meson at Q2 =~ 0.5-GeV2

The Jefferson Laboratory E91-016 collaboration Ambrozewicz, P. ; Mitchell, J. ; Dunne, J. ; et al.
Phys.Rev. C70 (2004) 035203, 2004.
Inspire Record 645605 DOI 10.17182/hepdata.31643

Electroproduction of the omega meson was investigated in the p(e,e'p)omega reaction. The measurement was performed at a 4-momentum transfer Q2 ~ 0.5 GeV2. Angular distributions of the virtual photon-proton center-of-momentum cross sections have been extracted over the full angular range. These distributions exhibit a strong enhancement over t-channel parity exchange processes in the backward direction. According to a newly developed electroproduction model, this enhancement provides significant evidence of resonance formation in the gamma* p -> omega p reaction channel.

2 data tables

Differential cross section for an average W of 1.75 GeV.

Differential cross section for an average W of 1.79 GeV.