Strong coupling models for dense and hot QCD

Abstract: Gauge/gravity duality can be useful to model QCD at intermediate temperatures and densities, where first-principles results are not available. This region is relevant for core-collapse supernovae and binary neutron star mergers. I present a new framework for the QCD equation of state which combines the holographic V-QCD model with traditional nuclear theory models, and covers all relevant temperatures and densities. I use V-QCD to describe both nuclear and quark matter at high densities, with temperature dependence estimated by employing a simple van der Waals hadron gas model. At low densities, I use DD2 Hempel-Schaffner-Bielich model, i.e., a statistical model for nuclear matter with relativistic mean field interactions. The resulting "hybrid" model gives predictions, among other things, for the mixed quark-hadron phase and the location of the critical endpoint of the quark-hadron transition. I will also discuss preliminary results from neutron star merger simulations which use this model.

HEP - theory

Audience: researchers in the topic

Advances in Theoretical Physics 2022

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