On the treatment of the $\Delta$-contribution in electromagnetic $pp$-knockout reactions

Abstract

The treatment of the $\Delta$-current and its contribution in the exclusive ${}^{16}$O$(e,e^{\prime }pp{)}^{14}$C and ${}^{16}$O$(\gamma ,pp{)}^{14}$C knockout reactions are investigated in combination with the effects of correlations. Different parametrizations of the effective $\Delta$-current and different treatments of correlations in the two-nucleon overlap function are considered. The results are presented and discussed for a suitable choice of kinematics. It is found that the investigation of different mutually supplementing kinematics is necessary to resolve the uncertainties in the theoretical ingredients and extract clear and unambiguous information on correlations.

15 pages, 9 figures, EPJA style

References in corpus (7)

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• Photo-emission of two protons from nuclei
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Cited by in corpus (6)

• Self-consistent Green's function theory for atomic nuclei
• Lepton scattering from ${}^{40}$Ar and ${}^{48}$Ti in the quasielastic peak region
• Knockout of proton-neutron pairs from ${}^{16}$O with electromagnetic probes
• Electromagnetic proton-neutron knockout off 16O: new achievements in theory
• Center-of-mass effects in electromagnetic two-proton knockout reactions
• Dependence of the ${}^{12}$C($\vec{\gamma }$,pd) reaction on photon linear polarisation