Pairing in pure neutron matter

Authors :: S. Ramanan
Michael Urban
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab)
Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Source :: Eur.Phys.J.ST, Eur.Phys.J.ST, 2021, 230, ⟨10.1140/epjs/s11734-021-00008-0⟩
Publication Year :: 2021
Publisher :: Springer Science and Business Media LLC, 2021.
Abstract: We review the long standing problem of superfluid pairing in pure neutron matter. For the $s$-wave pairing, we summarize the state of the art of many-body approaches including different $nn$ interactions, medium polarization, short-range correlations and BCS-BEC crossover effects, and compare them with quantum Monte Carlo results at low-densities. We also address pairing in the $p$-wave, which appears at higher densities and hence has large uncertainties due to the poorly constrained interactions, medium effects and many-body forces.<br />Comment: 15 pages, Mini-review for EPJ Special Topics, v2: minor changes