Neutron-proton pairing in Nuclear Matter
Nuclear Theory
2019-07-26 v1
Abstract
The self-energy effect on the neutron-proton (np) pairing gap is investigated up to the third order within the framework of the extend Bruecker-Hartree-Fock (BHF) approach combined with the BCS theory. The self-energy up to the second-order contribution turns out to reduce strongly the effective energy gap, while the \emph{renormalization} term enhances it significantly. In addition, the effect of the three-body force on the np pairing gap is shown to be negligible. To connect the present results with the np pairing in finite nuclei, an effective density-dependent zero-range pairing force is established with the parameters calibrated to the microscopically calculated energy gap.
Cite
@article{arxiv.1907.10986,
title = {Neutron-proton pairing in Nuclear Matter},
author = {Xiao-Hua Fan and Xin-le Shang and Jian-Min Dong and Wei Zuo},
journal= {arXiv preprint arXiv:1907.10986},
year = {2019}
}