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- Title
DEEPLY VIRTUAL AND EXCLUSIVE PRODUCTION OF THE OMEGA MESON.
- Authors
Caftçon, M.; Morand, L.; Doré, D.; Laget, J,-M.; Morrow, S.; Sabatié, F.
- Abstract
Exclusive ω electroproduction off the proton was measured at the highest possible four-momentum transfer with the (close to) 6 GeV beam now available at CEBAF. Cross sections are presented, together with an analysis of the ω spin density matrix elements. Indications are that π° exchange in the t-channel (or rather the exchange of the corresponding saturating Regge trajectory) seems to dominate the process γ* → ωp, even for photon virtuality Q² as large as 5 GeV². Contributions of the handbag type, related to Generalized Patton Distributions in the nucleon, are therefore difficult to extract from this particular process.
- Subjects
PROTONS; ATOMS; BARYONS; PHOTONS; PARTICLES (Nuclear physics); NUCLEAR physics
- Publication
International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics, 2005, Vol 20, Issue 8/9, p1943
- ISSN
0217-751X
- Publication type
Article