QCD critical point in the strong coupling lattice QCD and during black hole formation

TL;DR

This paper explores the QCD phase diagram using strong coupling lattice QCD with Polyakov loop effects and discusses the potential to observe the QCD critical point during black hole formation, linking theoretical predictions with astrophysical phenomena.

Contribution

It introduces a combined analysis of the QCD phase diagram in strong coupling lattice QCD and proposes a novel way to probe the QCD critical point during black hole formation processes.

Findings

Deviations in chiral and deconfinement transition boundaries at finite chemical potential.

The thermodynamical evolution in black hole formation can sweep the QCD critical point.

The probed regions in heavy-ion collisions and black hole formation encompass predicted critical point locations.

Abstract

We discuss the QCD phase diagram from two different point of view. We first investigate the phase diagram structure in the strong coupling lattice QCD with Polyakov loop effects, and show that the the chiral and Z_{N_c} deconfinement transition boundaries deviate at finite mu as suggested from large N_c arguments. Next we discuss the possibility to probe the QCD critical point during prompt black hole formation processes. The thermodynamical evolution during the black hole formation would result in quark matter formation, and the critical point in isospin asymmetric matter may be swept. (T,mu_B) region probed in heavy-ion collisions and the black hole formation processes covers most of the critical point locations predicted in recent lattice Monte-Carlo simulations and chiral effective models.