Polarization phenomena in vector meson photoproduction on nucleons near threshold

Details Polarization phenomena in vector meson photoproduction on nucleons near threshold Polarization phenomena in vector meson photoproduction on nucleons near threshold

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..570..551b&link_type=abstract

The fourteenth international spin physics symposium, SPIN2000. AIP Conference Proceedings, Volume 570, pp. 551-555 (2001).

Physics

Meson Production, Polarization In Interactions And Scattering, Multichannel Scattering, Potential Models

Scientific paper

We propose and develop a model for ρ0 and ω photoproduction on nucleons near threshold based on t-, s-, and u-channel amplitudes. In t-channel we consider π- and σ- exchanges and we take the coupling constants (gv,gt) in (s+u) nucleon contributions as free parameters. We fit our model to the available experimental differential cross-section data of γ+p-->p+V reactions. We find that different models which are equivalently good for the description of the differential cross-section on proton targets may be differentiated by their predictions of the beam asymmetry on proton and neutron targets and of the differential cross-section on neutron targets. .

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