Neutron Star Properties from Extended Sigma Model
Physics#Nuclear Physics, Neutron Stars🔬 Research|Analyzed: Jan 3, 2026 18:45•
Published: Dec 29, 2025 14:01
•1 min read
•ArXivAnalysis
This paper investigates neutron star structure using a baryonic extended linear sigma model. It highlights the importance of the pion-nucleon sigma term in achieving realistic mass-radius relations, suggesting a deviation from vacuum values at high densities. The study aims to connect microscopic symmetries with macroscopic phenomena in neutron stars.
Key Takeaways
- •The study uses an extended linear sigma model to model neutron star properties.
- •The pion-nucleon sigma term is crucial for realistic mass-radius relations.
- •The paper suggests a density-dependent sigma term, deviating from vacuum values.
- •The research aims to connect microscopic symmetries with macroscopic neutron star behavior.
Reference / Citation
View Original"The $πN$ sigma term $σ_{πN}$, which denotes the contribution of explicit symmetry breaking, should deviate from its empirical values at vacuum. Specifically, $σ_{πN}\sim -600$ MeV, rather than $(32-89) m \ MeV$ at vacuum."