Holographic quark matter with color superconductivity and a stiff equation of state for compact stars
Holographic quark matter with color superconductivity and a stiff equation of state for compact stars
We present a holographic model of QCD with a first order chiral restoration phase transition with chemical potential, μ. The first order behavior follows from allowing a discontinuity in the dual description as the quarks are integrated out below their constituent mass. The model predicts a deconfined yet massive quark phase at intermediate densities (350 MeV<μ<500 MeV), above the nuclear density phase, which has a very stiff equation of state and a speed of sound close to one. We also include a holographic description of a color superconducting condensate in the chirally restored vacuum and study the resulting equation of state. They provides a well behaved first order transition from the deconfined massive quark phase at very high density (μ>500 MeV). We solve the Tolman-Oppenheimer-Volkoff equations with the resulting equations of state and find stable hybrid stars with quark cores. We compute the tidal deformability for these hybrid stars and show they are consistent with LIGO/Virgo data on a neutron star collision. Our holographic model shows that quark matter could be present at the core of such compact stars.
astro-ph.HE, hep-ph, hep-th
Fadafan, Kazem Bitaghsir
09897b8e-7f1c-4303-8b67-e869811f9716
Rojas, Jesus Cruz
4cab2072-a7b4-42d4-a9ea-e536f065d51e
Evans, Nicholas
33dfbb52-64dd-4c1f-9cd1-074faf2be4b3
15 January 2021
Fadafan, Kazem Bitaghsir
09897b8e-7f1c-4303-8b67-e869811f9716
Rojas, Jesus Cruz
4cab2072-a7b4-42d4-a9ea-e536f065d51e
Evans, Nicholas
33dfbb52-64dd-4c1f-9cd1-074faf2be4b3
Fadafan, Kazem Bitaghsir, Rojas, Jesus Cruz and Evans, Nicholas
(2021)
Holographic quark matter with color superconductivity and a stiff equation of state for compact stars.
Phys. Rev. E, 103 (2), [026012].
(doi:10.1103/PhysRevD.103.026012).
Abstract
We present a holographic model of QCD with a first order chiral restoration phase transition with chemical potential, μ. The first order behavior follows from allowing a discontinuity in the dual description as the quarks are integrated out below their constituent mass. The model predicts a deconfined yet massive quark phase at intermediate densities (350 MeV<μ<500 MeV), above the nuclear density phase, which has a very stiff equation of state and a speed of sound close to one. We also include a holographic description of a color superconducting condensate in the chirally restored vacuum and study the resulting equation of state. They provides a well behaved first order transition from the deconfined massive quark phase at very high density (μ>500 MeV). We solve the Tolman-Oppenheimer-Volkoff equations with the resulting equations of state and find stable hybrid stars with quark cores. We compute the tidal deformability for these hybrid stars and show they are consistent with LIGO/Virgo data on a neutron star collision. Our holographic model shows that quark matter could be present at the core of such compact stars.
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holographic quark
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Accepted/In Press date: 4 January 2021
Published date: 15 January 2021
Additional Information:
Funding Information:
N. E.’s work was supported by the STFC consolidated Grant No. ST/P000711/1, and JCR’s by Mexico’s National Council of Science and Technology (CONACyT) Grant No. 439332.
Publisher Copyright:
© 2021 authors.
Keywords:
astro-ph.HE, hep-ph, hep-th
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Local EPrints ID: 446455
URI: http://eprints.soton.ac.uk/id/eprint/446455
PURE UUID: 90b4dc8b-55cf-429a-8645-5b58381903fd
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Date deposited: 10 Feb 2021 17:33
Last modified: 01 Apr 2025 16:50
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Author:
Kazem Bitaghsir Fadafan
Author:
Jesus Cruz Rojas
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