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-Sakai-Sugimoto model and the so-called homogeneous ansatz for the gauge fields in the bulk to describe baryonic matter. Within the confi...
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| Format: | Article |
| Language: | English |
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SciPost
2021-08-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.11.2.029 |
| _version_ | 1818888267250008064 |
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| author | Nicolas Kovensky, Andreas Schmitt |
| author_facet | Nicolas Kovensky, Andreas Schmitt |
| author_sort | Nicolas Kovensky, Andreas Schmitt |
| collection | DOAJ |
| description | We study baryonic matter with isospin asymmetry, including fully dynamically
its interplay with pion condensation. To this end, we employ the holographic
Witten-Sakai-Sugimoto 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. |
| first_indexed | 2024-12-19T16:50:24Z |
| format | Article |
| id | doaj.art-045ac96f9b004e5ea7c0918bc29ebf03 |
| institution | Directory Open Access Journal |
| issn | 2542-4653 |
| language | English |
| last_indexed | 2024-12-19T16:50:24Z |
| publishDate | 2021-08-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj.art-045ac96f9b004e5ea7c0918bc29ebf032022-12-21T20:13:33ZengSciPostSciPost Physics2542-46532021-08-0111202910.21468/SciPostPhys.11.2.029Isospin asymmetry in holographic baryonic matterNicolas Kovensky, Andreas SchmittWe study baryonic matter with isospin asymmetry, including fully dynamically its interplay with pion condensation. To this end, we employ the holographic Witten-Sakai-Sugimoto 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.https://scipost.org/SciPostPhys.11.2.029 |
| spellingShingle | Nicolas Kovensky, Andreas Schmitt Isospin asymmetry in holographic baryonic matter SciPost Physics |
| title | Isospin asymmetry in holographic baryonic matter |
| title_full | Isospin asymmetry in holographic baryonic matter |
| title_fullStr | Isospin asymmetry in holographic baryonic matter |
| title_full_unstemmed | Isospin asymmetry in holographic baryonic matter |
| title_short | Isospin asymmetry in holographic baryonic matter |
| title_sort | isospin asymmetry in holographic baryonic matter |
| url | https://scipost.org/SciPostPhys.11.2.029 |
| work_keys_str_mv | AT nicolaskovenskyandreasschmitt isospinasymmetryinholographicbaryonicmatter |