Isospin asymmetry in holographic baryonic matter
Isospin asymmetry in holographic baryonic matter
We study baryonic matter with isospin asymmetry, including fully dynamically its interplay with pion condensation. To this end, we employ the holographic Witten-SakaiSugimoto model and the so-called homogeneous ansatz for the gauge fields in the bulk to describe baryonic matter. Within the confined geometry and restricting ourselves to the chiral limit, we map out the phase structure in the presence of baryon and isospin chemical potentials, showing that for sufficiently large chemical potentials condensed pions and isospin-asymmetric baryonic matter coexist. We also present first results of the same approach in the deconfined geometry and demonstrate that this case, albeit technically more involved, is better suited for comparisons with and predictions for real-world QCD. Our study lays the ground for future improved holographic studies aiming towards a realistic description of charge neutral, beta-equilibrated matter in compact stars, and also for more refined comparisons with lattice studies at nonzero isospin chemical potential.
Kovensky, Nicolas
6fdce7c8-51ce-4d21-8223-e16bd1a182c8
Schmitt, Andreas
1765159f-255f-45e7-94ea-58c1c883d65f
12 August 2021
Kovensky, Nicolas
6fdce7c8-51ce-4d21-8223-e16bd1a182c8
Schmitt, Andreas
1765159f-255f-45e7-94ea-58c1c883d65f
Abstract
We study baryonic matter with isospin asymmetry, including fully dynamically its interplay with pion condensation. To this end, we employ the holographic Witten-SakaiSugimoto model and the so-called homogeneous ansatz for the gauge fields in the bulk to describe baryonic matter. Within the confined geometry and restricting ourselves to the chiral limit, we map out the phase structure in the presence of baryon and isospin chemical potentials, showing that for sufficiently large chemical potentials condensed pions and isospin-asymmetric baryonic matter coexist. We also present first results of the same approach in the deconfined geometry and demonstrate that this case, albeit technically more involved, is better suited for comparisons with and predictions for real-world QCD. Our study lays the ground for future improved holographic studies aiming towards a realistic description of charge neutral, beta-equilibrated matter in compact stars, and also for more refined comparisons with lattice studies at nonzero isospin chemical potential.
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Isospin asymmetry in holographic baryonic matter
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Accepted/In Press date: 16 July 2021
Published date: 12 August 2021
Additional Information:
Funders for the research work leading to this publication: European Research Council [ERC], Leverhulme Trust and Science and Technology Facilities Council [STFC].
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Local EPrints ID: 477103
URI: http://eprints.soton.ac.uk/id/eprint/477103
ISSN: 2542-4653
PURE UUID: 582941be-f6f1-41c0-b213-21dc356f4083
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Date deposited: 26 May 2023 16:36
Last modified: 17 Mar 2024 03:40
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Author:
Nicolas Kovensky
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