Erratum to: “Scattering of vector mesons off nucleons” [Nucl. Phys. A 706 (2002) 431]

Scattering of vector mesons off nucleons

We construct a relativistic and unitary approach to ’high’ energy pionand photonnucleon reactions taking the πN, π∆, ρN , ωN , ηN,KΛ,KΣ final states into account. Our scheme dynamically generates the sand d-wave nucleon resonances N(1535), N(1650) and N(1520) and isobar resonances ∆(1620) and ∆(1700) in terms of quasi-local interaction vertices. The description of photon-induced processes is ba...

Scattering of photons and vector mesons off nucleonsG

To leading order in the baryon density, the properties of vector mesons in nuclear matter are determined by the vectormeson nucleon scattering amplitudes. Since these amplitudes are not directly constrained by data, there are presently large theoretical ambiguities in predictions of the vector-meson spectral densities in nuclear matter. We address this problem by implementing the constraints fr...

Inelastic Charged - Lepton Scattering off Nucleons * _ Clemens

Deep-inelastic scattering from off-shell nucleons.

We derive the general structure of the hadronic tensor required to describe deep-inelastic scattering from an off-shell nucleon within a covariant formalism. Of the large number of possible off-shell structure functions we find that only three contribute in the Bjorken limit. In our approach the usual ambiguities encountered when discussing problems related to off-shellness in deep-inelastic sc...

2 00 1 Photoproduction of η and η ′ mesons off nucleons close to threshold 1

The importance of Born terms and resonance exchange for η and η ′ photoproduction off both the proton and neutron within U (3) baryon chi-ral perturbation theory is investigated. Low-lying resonances such as the vector mesons and J P = 1/2 + , 1/2 − baryon resonances are included explicitly and their contributions together with the Born terms are calculated. The coupling constants of the resona...