The Baryonic Phase in Holographic Descriptions of the QCD Phase Diagram

Details The Baryonic Phase in Holographic Descriptions of the QCD Phase Diagram The Baryonic Phase in Holographic Descriptions of the QCD Phase Diagram

2012-04-25

arxiv.org/abs/1204.5640v1

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, 7 figures

Scientific paper

We study holographic models of the QCD temperature-chemical potential phase diagram based on the D3/D7 system with chiral symmetry breaking. The baryonic phase may be included through linked D5-D7 systems. In a previous analysis of a model with a running gauge coupling a baryonic phase was shown to exist to arbitrarily large chemical potential. Here we explore this phase in a more generic phenomenological setting with a step function dilaton profile. The change in dilaton generates a linear confining $\bar{q}q$ potential and opposes the screening effect of temperature. We show that the persistence of the baryonic phase depends on the step size and that QCD-like phase diagrams can be described. The baryonic phase's existence is qualitatively linked to the existence of confinement in Wilson loop computations in the background.

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