Isospin asymmetry and neutron stars in V-QCD
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866912602034012160 |
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| author | Bartolini, Lorenzo Gudnason, Sven Bjarke Järvinen, Matti |
| author_facet | Bartolini, Lorenzo Gudnason, Sven Bjarke Järvinen, Matti |
| contents | Isospin asymmetric nuclear matter is introduced to V-QCD, a bottom-up holographic Quantum Chromodynamics (QCD) model. Using a small isospin chemical potential we extract the symmetry energy in the model, finding excellent agreement with experimental results for some of the potentials. Extending the calculation for finite and arbitrary sized isospin chemical potentials, we construct beta-equilibrated neutron stars via the usual Tolman-Oppenheimer-Volkov (TOV) equations. We find, pleasingly, that the neutron stars passing the mass/radius and tidal deformability constraints are those with the potentials that also lead to excellent symmetry energies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_01758 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Isospin asymmetry and neutron stars in V-QCD Bartolini, Lorenzo Gudnason, Sven Bjarke Järvinen, Matti High Energy Physics - Phenomenology High Energy Physics - Theory Nuclear Theory Isospin asymmetric nuclear matter is introduced to V-QCD, a bottom-up holographic Quantum Chromodynamics (QCD) model. Using a small isospin chemical potential we extract the symmetry energy in the model, finding excellent agreement with experimental results for some of the potentials. Extending the calculation for finite and arbitrary sized isospin chemical potentials, we construct beta-equilibrated neutron stars via the usual Tolman-Oppenheimer-Volkov (TOV) equations. We find, pleasingly, that the neutron stars passing the mass/radius and tidal deformability constraints are those with the potentials that also lead to excellent symmetry energies. |
| title | Isospin asymmetry and neutron stars in V-QCD |
| topic | High Energy Physics - Phenomenology High Energy Physics - Theory Nuclear Theory |
| url | https://arxiv.org/abs/2504.01758 |