Holographic neutrino transport in dense strongly-coupled matter

Abstract

A (toy) model for cold and luke-warm strongly-coupled nuclear matter at finite baryon density is used to study neutrino transport. The complete charged current two-point correlators are computed in the strongly-coupled medium and their impact on neutrino transport is analyzed. The full result is compared with various approximations for the current correlators and the distributions, including the degenerate approximation, the hydrodynamic approximation as well as the diffusive approximation and we comment on their successes. Further improvements are discussed.

Comments: 67 pages + Appendix; 27 figures. Accepted for publication in JHEP. The treatment of isospin asymmetry was not correct in the previous version, so the isospin chemical potential is set to zero in this new version. Most of our results are qualitatively unchanged. We are planning to study the isospin asymmetric case in a future work