Thermal pion condensation: holography meets lattice QCD
Thermal pion condensation: holography meets lattice QCD
The holographic Witten-Sakai-Sugimoto model is often employed to describe strongly-coupled baryonic and isospin-asymmetric matter, for example in the context of neutron stars. Here we consider the case of vanishing baryon chemical potential, where detailed comparisons to data from lattice QCD are possible. To this end, we extend previous works by including a realistic pion mass and pion condensation into the decompactified limit of the model and evaluate the system for arbitrary isospin chemical potentials and temperatures. After suitably fixing the 3 parameters of the model, we find that the overall phase structure is in excellent agreement with lattice results. This also holds for observables at low temperatures in the strongly coupled regime, while we discover and discuss some discrepancies at large temperatures. Our findings give reassurance for the validity of previous and future applications of this model and highlight the aspects where improvements are needed.
Kovensky, Nicolas
6fdce7c8-51ce-4d21-8223-e16bd1a182c8
Schmitt, Andreas
1765159f-255f-45e7-94ea-58c1c883d65f
17 October 2024
Kovensky, Nicolas
6fdce7c8-51ce-4d21-8223-e16bd1a182c8
Schmitt, Andreas
1765159f-255f-45e7-94ea-58c1c883d65f
Kovensky, Nicolas and Schmitt, Andreas
(2024)
Thermal pion condensation: holography meets lattice QCD.
JHEP, 2024, [133].
(doi:10.1007/JHEP10(2024)133).
Abstract
The holographic Witten-Sakai-Sugimoto model is often employed to describe strongly-coupled baryonic and isospin-asymmetric matter, for example in the context of neutron stars. Here we consider the case of vanishing baryon chemical potential, where detailed comparisons to data from lattice QCD are possible. To this end, we extend previous works by including a realistic pion mass and pion condensation into the decompactified limit of the model and evaluate the system for arbitrary isospin chemical potentials and temperatures. After suitably fixing the 3 parameters of the model, we find that the overall phase structure is in excellent agreement with lattice results. This also holds for observables at low temperatures in the strongly coupled regime, while we discover and discuss some discrepancies at large temperatures. Our findings give reassurance for the validity of previous and future applications of this model and highlight the aspects where improvements are needed.
Text
JHEP02(2024)041
- Version of Record
More information
Accepted/In Press date: 28 August 2024
Published date: 17 October 2024
Identifiers
Local EPrints ID: 499814
URI: http://eprints.soton.ac.uk/id/eprint/499814
ISSN: 1126-6708
PURE UUID: fe2e7997-b281-4af7-9b63-716855a89820
Catalogue record
Date deposited: 07 Apr 2025 16:31
Last modified: 22 Aug 2025 02:14
Export record
Altmetrics
Contributors
Author:
Nicolas Kovensky
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
