Meson exchange currents in electromagnetic one-nucleon emission

Abstract

The role of meson exchange currents (MEC) in electron- and photon-induced one-nucleon emission processes is studied in a nonrelativistic model including correlations and final state interactions. The nuclear current is the sum of a one-body and of a two-body part. The two-body current includes pion seagull, pion-in-flight and the isobar current contributions. Numerical results are presented for the exclusive 16O(e,e'p)15N and 16O(γ,p)15N reactions. MEC effects are in general rather small in (e,e'p), while in (γ,p) they are always large and important to obtain a consistent description of (e,e'p) and (γ,p) data, with the same spectroscopic factors. The calculated (γ,p) cross sections are sensitive to short-range correlations at high values of the recoil momentum, where MEC effects are larger and overwhelm the contribution of correlations.

9 pages, 6 figures

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Cited by in corpus (7)

• Relativistic descriptions of inclusive quasielastic electron scattering: application to scaling and superscaling ideas
• Determination of the argon spectral function from (e,e'p) data
• Effects of nuclear correlations on the ${}^{16}$O$(e,e^{\prime }pN)$ reactions to discrete final states
• Semi-relativistic meson exchange currents in (e,e') and (e,e'p) reactions
• Meson Exchange Currents in (e,e'p) recoil polarization observables
• Electromagnetic proton-neutron knockout off 16O: new achievements in theory
• Center-of-mass effects in electromagnetic two-proton knockout reactions