https://doi.org/10.1140/epjc/s10052-025-14417-1
Regular Article - Theoretical Physics
Impact of QCD sum rules coupling constants on neutron stars structure
1
Department of Physics, University of Tehran, North Karegar Avenue, 14395-547, Tehran, Iran
2
Centro Brasileiro de Pesquisas Fısicas, Rua Dr. Xavier Sigaud, 150, URCA, CEP 22290-180, Rio de Janeiro, RJ, Brazil
3
Department of Physics, Dogus University, Dudullu-Ümraniye, 34775, Istanbul, Türkiye
Received:
27
March
2025
Accepted:
10
June
2025
Published online:
24
June
2025
We present a detailed investigation on the structure of neutron stars, incorporating the presence of hyperons within a relativistic model under the mean-field approximation. Employing coupling constants derived from QCD sum rules, we explore the particle fraction in beta equilibrium and establish the mass-radius relationship for neutron stars with hyperonic matter. Additionally, we compute the stellar Love number (
) and the tidal deformability parameter (
), providing valuable insights into the dynamical properties of these celestial objects. Through comparison with theoretical predictions and observational data, our results exhibit good agreement, affirming the validity of our approach. These findings contribute significantly to refining the understanding of neutron star physics, particularly in environments containing hyperons, and offer essential constraints on the equation of state governing such extreme astrophysical conditions.
© The Author(s) 2025
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