Cool baryon and quark matter in holographic QCD

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Ishii , T , Järvinen , M & Nijs , G 2019 , ' Cool baryon and quark matter in holographic QCD ' , Journal of High Energy Physics , no. 7 , 003 .

Title: Cool baryon and quark matter in holographic QCD
Author: Ishii, Takaaki; Järvinen, Matti; Nijs, Govert
Contributor: University of Helsinki, Department of Physics
Date: 2019-07-01
Language: eng
Number of pages: 50
Belongs to series: Journal of High Energy Physics
ISSN: 1029-8479
Abstract: We establish a holographic bottom-up model which covers both the baryonic and quark matter phases in cold and dense QCD. This is obtained by including the baryons using simple approximation schemes in the V-QCD model, which also includes the backreaction of the quark matter to the dynamics of pure Yang-Mills. We examine two approaches for homogeneous baryon matter: baryons as a thin layer of noninteracting matter in the holographic bulk, and baryons with a homogeneous bulk gauge field. We find that the second approach exhibits phenomenologically reasonable features. At zero temperature, the vacuum, baryon, and quark matter phases are separated by strongly first order transitions as the chemical potential varies. The equation of state in the baryonic phase is found to be stiff, i.e., the speed of sound clearly exceeds the value c2 = 1/3 of conformal plasmas at high baryon densities.
Subject: Gauge-gravity correspondence
Phase Diagram of QCD
114 Physical sciences

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