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PreprintCC BY 4.0arXiv

Hybrid stars with hyperons: structure based on QCD sum rule coupling constants

  • F. Moradi Jangal
  • H. R. Moshfegh
  • K. Azizi
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Abstract

We present a comprehensive study of hybrid stars composed of hadrons, leptons, and quarks within a relativistic mean-field framework. Using coupling constants derived from QCD sum rules (QCDSR), we first determine the bulk properties of nuclear matter and evaluate the single-particle potentials of nucleons and hyperons to constrain the hadronic sector. The equation of state (EOS) under beta equilibrium is then constructed employing the σ−ω−ρ model for the hadronic phase, while the quark phase is described using both the MIT bag model and the Nambu-Jona-Lasinio (NJL) model. The hadron-quark phase transition is analyzed through both Gibbs and Maxwell constructions. Based on resulting EOSs, we obtain the mass-radius relations of hybrid stars, investigate particle fractions and their radial distributions, and calculate the tidal Love number (𝒦2) and the dimensionless tidal deformability (varLambda). Our results provide quantitative predictions relevant for comparison with current multimessenger astrophysical observations.

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Cite

BibTeXRIS
BibTeX
@misc{jangal2026hybrid,
  title = {{Hybrid stars with hyperons: structure based on QCD sum rule coupling constants}},
  author = {F. Moradi Jangal and H. R. Moshfegh and K. Azizi},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2606.20111},
  eprint = {2606.20111},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.20111},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Hybrid stars with hyperons: structure based on QCD sum rule coupling constants
AU  - F. Moradi Jangal
AU  - H. R. Moshfegh
AU  - K. Azizi
PY  - 2026
DA  - 2026/11/02
PB  - arXiv
DO  - 10.48550/arxiv.2606.20111
UR  - https://arxiv.org/abs/2606.20111
AB  - We present a comprehensive study of hybrid stars composed of hadrons, leptons, and quarks within a relativistic mean-field framework. Using coupling constants derived from QCD sum rules (QCDSR), we first determine the bulk properties of nuclear matter and evaluate the single-particle potentials of nucleons and hyperons to constrain the hadronic sector. The equation of state (EOS) under beta equilibrium is then constructed employing the σ−ω−ρ model for the hadronic phase, while the quark phase is described using both the MIT bag model and the Nambu-Jona-Lasinio (NJL) model. The hadron-quark phase transition is analyzed through both Gibbs and Maxwell constructions. Based on resulting EOSs, we obtain the mass-radius relations of hybrid stars, investigate particle fractions and their radial distributions, and calculate the tidal Love number (𝒦_2) and the dimensionless tidal deformability (varLambda). Our results provide quantitative predictions relevant for comparison with current multimessenger astrophysical observations.
ER  -