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The baryonic phase in holographic descriptions of the QCD phase diagram

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Abstract

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 qq 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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Authors and Affiliations

  1. School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, U.K.

    Nick Evans, Keun-Young Kim & Maria Magou

  2. Institute for Theoretical Physics University of Amsterdam, Science Park 904, Postbus 94485, 1090, GL, Amsterdam, The Netherlands

    Keun-Young Kim

  3. Department of Physics, Hanyang University, Seoul, 133-791, Korea

    Yunseok Seo & Sang-Jin Sin

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  1. Nick Evans
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  2. Keun-Young Kim
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  3. Maria Magou
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  4. Yunseok Seo
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  5. Sang-Jin Sin
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Correspondence to Nick Evans.

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ArXiv ePrint: 1204.5640

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Evans, N., Kim, KY., Magou, M. et al. The baryonic phase in holographic descriptions of the QCD phase diagram. J. High Energ. Phys. 2012, 45 (2012). https://doi.org/10.1007/JHEP09(2012)045

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