Proton spectral functions in finite nuclei based on the extended Brueckner-Hartree-Fock approach

TL;DR

This study calculates proton spectral functions in finite nuclei using advanced theoretical models, showing good agreement with experiments at low momenta and revealing target-dependent behaviors linked to nuclear density variations.

Contribution

The paper introduces a combined approach using Skyrme-Hartree-Fock and extended Brueckner-Hartree-Fock methods to analyze proton spectral functions in finite nuclei, highlighting target dependence and density effects.

Findings

Scaled spectral functions match experimental data at small momenta.

Differences between theory and experiment grow at high momenta.

Proton spectral functions depend on target nucleus and local density.

Abstract

We have calculated the proton spectral functions in finite nuclei based on the local density approximation where the properties of finite nuclei and nuclear matter are calculated by the Skyrme-Hartree-Fock method and the extended Brueckner-Hartree-Fock approach, respectively. The scaled spectral function from our calculation is in good agreement with experimental results at small momenta while the difference between them becomes apparent at high momenta. Besides, a target dependence of the scaled proton spectral function is also obtained in our calculation as was observed in experiment. A further investigation indicates that the proportion of the high density region of the proton has a significant contribution to this target-dependent behavior since the spectral function in asymmetric nuclear matter increases significantly as a function of density.