2017/06/30 by Renato Critelli, Jorge Noronha, Jacquelyn Noronha-Hostler +3 · 2 citations
Physics and Astronomy · #nucl-th #hep-lat #hep-ph #hep-th #nucl-ex
paper · pdf · doi:10.1103/physrevd.96.096026
published as Phys. Rev. D 96, 096026 (2017) · 23 pages, 16 figures, accepted for publication in Physical Review D (v3: updated information on affiliations and grants)
arxiv created 2017/11/10 · arxiv updated 2017/11/29
Strongly interacting matter undergoes a crossover phase transition at high temperatures T∼ 1012 K and zero net-baryon density. A fundamental question in the theory of strong interactions, Quantum Chromodynamics (QCD), is whether a hot and dense system of quarks and gluons displays critical phenomena when doped with more quarks than antiquarks, where net-baryon number fluctuations diverge. Recent lattice QCD work indicates that such a critical point can only occur in the baryon dense regime of the theory, which defies a description from first principles calculations. Here we use the holographic gauge/gravity correspondence to map the fluctuations of baryon charge in the dense quark-gluon liquid onto a numerically tractable gravitational problem involving the charge fluctuations of holographic black holes. This approach quantitatively reproduces ab initio results for the lowest order moments of the baryon fluctuations and makes predictions for the higher order baryon susceptibilities and also for the location of the critical point, which is found to be within the reach of heavy ion collision experiments.