Knockout of proton-neutron pairs from $^{16}$O with electromagnetic probes

TL;DR

This paper improves a theoretical model for two-nucleon knockout from oxygen-16 using electromagnetic probes, achieving better agreement with experimental data for electron-induced reactions but overestimating photon-induced cross sections at low missing momentum.

Contribution

The paper presents enhancements to the Pavia model, leading to more accurate predictions of knockout cross sections in electron scattering experiments.

Findings

Better agreement with (e,e'pn) experimental data

Over-prediction of (γ,pn) cross sections at low missing momentum

Model improvements enhance understanding of nucleon knockout mechanisms

Abstract

After recent improvements to the Pavia model of two-nucleon knockout from $^{16}$O with electromagnetic probes the calculated cross sections are compared to experimental data from such reactions. Comparison with data from a measurement of the $^{16}$O(e,e$'$pn) reaction show much better agreement between experiment and theory than was previously observed. In a comparison with recent data from a measurement of the $^{16}$O($\gamma$,pn) reaction the model over-predicts the measured cross section at low missing momentum.