Electron correlations in the antiproton energy loss distribution in He
Atomic Physics
2025-09-30 v1
Abstract
We present ab-initio calculations of the electronic differential energy transfer (DET) cross-sections for antiprotons with energies between keV and MeV interacting with helium. By comparison with simulations employing the mean-field description based on the single-active electron approximation we are able to identify electron correlation effects in the stopping and straggling cross sections. Most remarkably, we find that straggling exceeds the celebrated Bohr straggling limit when correlated shake-up processes are included.
Keywords
Cite
@article{arxiv.1901.10212,
title = {Electron correlations in the antiproton energy loss distribution in He},
author = {S. Borbély and X. -M. Tong and S. Nagele and J. Feist and I. Březinová and F. Lackner and L. Nagy and K. Tőkési and J. Burgdörfer},
journal= {arXiv preprint arXiv:1901.10212},
year = {2025}
}